What's wrong with my subaru?

What is your question?

Bought a 2013 Subaru Legacy, previous owner didn't change CVT fluid in over 127k miles. My bad. Got a reman transmission. 2 months later felt a vibration when accelerating, before the shift and went away after the vehicle shifted. Was not vibrating when shifted into neutral. Took it into the transmission shop. They said control arms. Did those and didn't get better. Did all 4 struts and shocks. Took it back a month later after the vibration increased. He replaced both axles, driveshaft and torque converter, torque converter piece was busted off. Vibration has went down some but still noticeably there. Mechanic sent me home without fixing the problem and gave me a discounted bill... other mechanics want 1000's to try and diagnose. Are they missing something? Thanks in advance!

What makes this problem better or worse?

Accelerating

How long has your 2013 Subaru Legacy had this problem?

3 months