Cruz, I would suggest that before you TOFTT, you speak to Gina first. I am sure Mikey would agree that if you discussed your concerns with Gina about Trisha's bad review, then she would give you an honest appraisal of where things sit right now in terms of her attitude and skills. I suggest this because she is more likely to be the one to get an honest assesment out of Trisha, and it eliminates the awkwardness of you having to talk to Trisha about those concerns personally.
Mikey, well maybe not yet ... but its just a matter of time, right???