I would stick with T1 mainly because I wouldn't be able to open up to someone who I was angry with on a regular basis. I can understand the desire to be pushed though. My understanding of trauma work, especially relational trauma is that it can go incredibly slow. So T1 might be trying to avoid retraumatizing you.

Have you talked with T1 specifically about your concerns? Would you be able to do everything other week switch? Or would insurance still not like that?