> I've enjoyed my Google music subscription for years as well, but I think it's pretty shady that lately they keep trying to bundle in a free YouTube subscription

Replacing GPM with YTMusic, unless the latter is updated to support everything, including personal music import and export, that the former does would be shady.

Giving me free YT Premium along with the GPM All Access I was already paying for at no additional cost is not, however, shady.