Sprint Account Merged to T-Mobile; Changes

My former Sprint plan did not have a limit on Premium Data or HD streaming and I had 10GB of Hotspot data. There were other features as well that I suspect may have changed; but in moving me to T-Mobile, my plan features were 'degraded' - I thought we were going to be put in a comparable plan with comparable features with our existing plan price.

What changed? Has anyone else experienced this?