1 Gold 3 Star Units are too strong
title pretty much says it all, it almost feels like you get punished for buying the more expensive units to try to complete a real team comp. rerolling 1 cost units and not even saving interest is way too viable and ruins the progression curve that is present in all the other incarnations of this genre. half the 5 cost units you don't even prioritize, a large portion of the 4 cost units are the same.
when you buy a draven for a third blademaster thats a huge powerspike, its a strong unit that is totally worth its cost. Gnar is really powerful with the right team, every 4 and 5 cost unit should be the same. you should feel a huge power spike by adding them to your board, instead if you try to actually utilize the interest mechanic and put together solid synergies you have a good chance of losing to the garen/darius 3 star andy's.
your ability to do well in team fight tactics should not be "click all the pictures that look the same as quickly as possible"