The Street Fighter 5 controversy will blow over in a month or two when all the content that should have been at launch drops. After that all future dlc is free if you play it enough and use fight money. The core gameplay is hands down the best current gen has to offer, and is easily at keast on par with classic fighters. When the bad launch decisions blow over, SFV will get nothing but praise based on what I have been playing.
And FYI, the server issues were fixed by day 2. I bought it a day after launch and NEVER had a problem with disconnects, finding a match, or connection to servers. The only problem I have run into is the occasional "failed to record fight data" which is annoying as all hell, but rare.
So no, I don't think this is the fall of fighters. Evolution for good or bad sure, but at least with SFV I feel confident that it will be as strong as ever.
EDIT BASED ON YOUR EDIT:
No I do not feel fighter are going downhill. Sure formulas have changed, some for better or worse, but they still offer a solid experience. There is some experimentation on content formulas across the board with all of them, but that is any game these days. In the end if you like fighters you will play them, if not this topic doesn't matter.








