There are certain characters that feel like they have a "peak".
Like with Cammy, how many variations of moves and techniques can you possibly apply. Where as with Ryu, just having the option of the parry makes things a lot more dynamic and skill based just by having that option out there.
Personally, I'm not getting bored with the game, it's just the fact that the online is a piece of shit that gets to me.
EDIT: Though shimmy's are most definitely annoying as fuck, considering they work like 99% of the time. Maybe people will learn to deal with them, maybe something will change idk. Though this isn't the first time I'm hearing Street Fighter veterans complain about shimmys being too good in this game.
EDIT2: And I will say this, if the game isn't fixed by August, which seems incredibly unlikely, then I'm just moving on to KOFXIV, and might not come back to this game.