Stop whining, OP. You got everyone to max level possible for 3 star units. You don't even have the episode pass. You are losing nothing. In fact, you've been handed a freebie which will convert to some amount of gear when the era ends. The people who actually have an argument to make here are, ironically enough, the whales. They have spent serious money getting to level 85, and now anyone who spent some crystals (possible F2P) to get to just 5 stars is getting a massive boost with that hotfix loot, because they can go from 75 to 85 (90 with 6 star units).
Hell, I only have the episode pass and 4 star units. I was able to go from 70 to 75, which, assuming the conversion to the Legacy system works correctly, means I am skipping right to G13.
With basic 3 star units, you reached max level. Anyone who also played daily F2P already was in the exact same spot as you. And this whole mess happens with 4 days left in the Era. The absolute most you're "losing" is a few hundred Era Currency if your overall rank degrades because people with the episode pass can now score higher and thus push you down in rankings. Oh, the horror. THE HORROR.
What a pointless, meritless bunch of whining.