The only balance change I don't understand is why all the skills that gave higher unit levels were nerfed so much. All of the skills like memories, golem master, taming, mage king, etc.

Was that really an issue? Now you need like 5 skill points just to raise units level by one for the specific units, and 10-12 points for the skill that affects more generalized units like with taming and memories.

Are heroes being balanced around the ultra high level heroes that people get from cheating or something?