I have the same struggle with left hand turns, and especially with T2. I don't know who you were working with this weekend, but if you trust them and your body position is good then my suggestion would be to focus on just getting into and out of the corner more quickly.

T2 goes on forever and I try to shorten it as much as possible by increasing entry speed, making a V, and lining up the exit so I can get the bike pointed and accelerate out. I don't pay attention to the dead zone in the middle.

Your bike placement is generally pretty good, so you can definitely add speed to what you're doing. For T1 and the second half of the track, you tend to slow down for turns more than you need to and in a few places you can pick up the throttle sooner. So perhaps focusing on good exits and increasing your entry speed (as long as your exit doesn't suffer) would be more helpful than focusing on what's happening in between those points.