NGB is the best full game, but its combat system is by far the weakest in the series imo. It has a ton of little attentions to detail and little matter of facts like unique block properties per weapon, but overal the combat is very simple. Beautiful in its simplicity, but simple (note, I don't mean simple in a bad way). It also is just one tightly nit whole, every enemy is built for this game and its weapons, which shows (and which again Sigma shows, by removing a ton of them and making a worse game because of it). NGII still has that balance of enemies designed around the game they inhabit, but it is just unfinished at times.
Razor's Edge is the equivalent of a kitchen sink smashed into a gamingstudio. The raw combat system, cicada, the bloody rage mechanic - it's the best combat system they've made imo. The downside being that everything around it just isn't built with it in mind. The enemies are like visitors from another game. The bosses don't work in tangent with the mechanics at all. Tons of balance issues, glitches, dull arenas, ugly music etc.
But yeah, Ryu's moveset and abilities, purely that, when it aligns and you've got a good fight on your hands, NG3:RE is top dog. There's so much creativity possible, while keeping an active flow of combat, just insanely good.
That's not really a rare statement either, most NG players I know that played all games on high enough level tend to agree NG3:RE has the best combat system, but just lacking in everything else. I used to hate the game but when I saw that shift in love, especially from players like Devilz and ShowR, I gave it another chance and it did not disappoint.
Regarding Steel on Bone, the original version was ass. What they did with RE was pretty smart, as it gave players a good OHKO option against foes, on the fly ability to heal, and it was something that allowed for bigger fights as well. I still feel the game would be better without it as it promotes a pretty defensive playstyle, but if you adapt the NGII playstyle and only do SoB after a Cicada, it is pure magic.
Not going to comment on story and the kunai, the story was always nonsensical super serious rubbish with some tits thrown in. The only thing cool about it was Ryu imo and the fantastic cutscenes in NGB by that studio whose name I keep forgetting. Kunai climbing was nearly completely removed. There's only like 3-4 sections of it left and they play at 300% original speed, harmless addition in NG3:RE (shit in NG3 though).
Don't take this the wrong way, but NG3:RE is really good but it, of all the games in the series, is only good if you put in the effort. Like The Evil Within you really got to sink your teeth into it, and especially for this game make some custom rules for yourself. Because if you don't hold back...well yeah. Then it's not NG3:RE. It's NG360:RE:
https://youtu.be/yH2ti7upQ9oI'm working on my article on NG3:RE currently, will have a lot more details but yeah I do consider it to have the best combat system in the series, perhaps in the genre; at least at its core. Just a shame that everything else is completely out of wack and the balance (of both enemies and you) is ripe with issues thanks to its 6 month dev time. It really could've been the best in the series had it been a fully fledged game. Which is why I still have faith in the team to make a good NG4.
If I had to rank them, I'd probably be something like this:
Combat System: NG3:RE > NGII > NGB > NGS > NGS2 > NG3
Complete package: NGB >>>>> NGS > NGII > NGS2 > NG3:RE > NG3
Personal preference: NGII > NGB > NG3:RE > NGS2 > NGS >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> NG3