The wake-up speed is definitely broken, but it's not gimmicky. There's legitimately nothing people can do to stop it which makes it too solid to be called a gimmick. It may be bullshit, but it is definitely not a gimmick.
As for moving around and hitting buttons... well if neither player knows how to space, the one with the longer penis normally pokes the other's eye out. It just so happens that Ryougi's penis is gigantic and she's flailing it around like a toy.
By all means call it bullshit. I don't support the idea that her gameplay is gimmicky though.
There
are instances where you can get meaty vs Ryougi. It's nothing BUT gimmicky to mash out stupid stuff(2a/throw) in those instances.
I wouldn't call those other things gimmicky either. But there are other things like this that are:
http://www.youtube.com/watch?v=jvhyo-LqpK4#t=8m53sWakeup 214c isn't really a wakeup, doing custom combo in neutral/pressure, with C using 421c to hit people crossup(there's different voice clips for 214c and 421c so this should really never hit people if they know about it), and the air tech attack are some examples of gimmicky things with her. There are also situations, similar to Nanaya mashing on 2a/2c at a distance in pressure, where you have to deal with her mashing even though there are great options to shut it down.
It's not just about being ignorant in how to space vs Ryougi. There are plenty of random bad things she can do that you have to be aware of and understand how to shut down. She isn't a gimmicky character like Necos that rely on that stuff to win matches but that stuff is definitely there.