Hey, thanks for the feedback! Yeah, I agree the reverb could be tweaked a bit more, I couldn't find a good balance between resonant and clean before the deadline, so I went with the safer choice of less reverb and more clarity in this case. And as you and purplessky mentioned, you guys are right that the piano does kinda lack power and clarity for parts of the piece, unfortunately I just couldn't find a good way for it to play at ff without sounding a bit harsh. If I ever really flesh out this piece, I'll probably use a brighter piano for the climax like you guys recommended.
I do think Intimate Grand Piano has a sustain pedal feature built into it, but to be perfectly honest, this was the first time I used this VST so I have no idea what kind of features it comes with haha.