Btx is full banana/rocker. It's going to very forgiving as it stands. A skate banana is going to be almost identical to the trs with btx. I wouldn't recommend buying another board until you demo some different boards. Another board is not going to immediately resolve the issues you describe. Before you buy a board, a lesson might help bolster your confidence and better your technique.
I agree with the lesson, but the 2010 trs had c2, I think 2008 was the last year they did full btx on the trs.
OP - What kind of riding do you do? And where do you do it?
I have had a trs with c2, a coda and an attack banana. The coda and attack banana are easier to get on edge, it barely takes any effort at all.
But if you are having issues with a 2010 trs you probably could use a refresh lesson, you might have an easier time with the full rocker boards but you should still fix your technique either way.