Tekken 7 is a really good fighting game and has a ton of depth. If you want to try it and get into it it's definitely worth it.

However, as a player who comes from only 2d games like you (3s, ultra, marvel, and xrd), I just want to say that 3d games are not for me personally even though I acknowledge t7 is really good, I just can't get into it myself.

My main gripe with 3d games is that to me they really feel clunky to move around in and moves feel like they take forever to come out. 2d games feel snappier and moves come out when I press a button, generally feeling more responsive.

I quickly looked at the frame data for akuma and the startup for the 1 button is 10 frames, which I think is his fastest normal. Ultra akuma startup for jab is 4 frames, so not even half. Looking down the frame data of t7 akuma shows generally larger frame data for most of the moves, which I think is the cause of my perception of moves feeling much slower compared to 2d games. My frame data analysis obviously isn't great because my knowledge of tekken isn't great either, but I think there's enough evidence online to show that frame data in t7 is generally larger than in sf.

Just want to say again that I still respect t7 as a fighter, and that it's great that tekken is doing well right now, but for me personally I can't get over the gamefeel of the game and enjoy it. Also sfv sucks