Hi there Leo,
I've been away for a few days, and I just caught up reading all of the posts in the MA talk forum. Then I remembered there were other areas here too.
1. Flexibility: In my experience the big advantage that really flexible people have is being able to escape from a hold more easily. This is especially useful on the ground where everything is "live".
2. Right hand: It's a little odd that you only train against right hand strikes. I've always advocated training against all angles and directions of attack. If your sensei doesn't mind that you have your partner also throw left side strikes then I'd definitely keep that up.
3. Striking: My jujutsu training was also lacking in stances and striking. The stances I could do without, but I really wished that I had learned more about proper striking mechanics. I am just now learning how to really throw a punch. I found that most jujutsu strikes were either more of an entering or finishing move, and not really more than a means to get into clinch range.
4. Speed: My personal rule of thumb is to do the technique as fast as you can and still do it correctly. With your TKD training I'm sure you already have the idea in your head that you have to learn a technique slowly first and then get progressively faster.
Honestly, it sounds like you are just more advanced (for lack of a better word) than most of the class. I've seen dojo that sort of get stuck at slow speed forever because that's what they're used to. Nobody ever gets hit, and they freak out if you make it a bit more alive than what they have come to expect.
I guess that's the way it goes. You can't have it all -- right? I hope you stick with jujutsu, and have fun.