Added 52 minutes later
If there is time, strength, and interest, it would be better to finally finish it properly. But minor fixes will continue to be released for at least another half a month after the final version.
Added 6 hours 35 minutes later
I thought about it. I nerfed the Tier 1 and Tier 2 alt-upgrades. I also reduced the randomness of packs of upgraded Tier 1, Tier 2, Tier 3, and Tier 4 creatures. This only applies to upgraded creatures, but in general, the range of 10-19 and 20-39 has shifted to 5-9 and 10-19. Considering that non-upgraded creatures in the form of neutrals are not so dangerous, I think it will work. (Although when Tier 3 and Tier 4 packs roll out in sizes like Tier 5 and Tier 6, it looks strange, but I don't have more fine-tuning yet)