Zubatcarteira
Now you're infected by the Musical Doodle
I assume you mean the max hp, since they already have a d8. That could help, but honestly, the issue is both having very weak stuff be able to do 1 damage (that's the power of a normal person's punch or kick, which is not too powerful, but still dangerous if it lands well), and things at different "tiers" dealing damage in the same manner, so a large number of weak things can kill something that they have no business hurting, like a commoner killing a dragon by just punching it in the nose a few thousand times.This is why I just don’t listen to the official stats for commoners. Instead, 1st level PCs aren’t special when it comes to HP. (Well high con Barbarians still are way outside the norm)
Basically they all have d8 hit die starting HP, unless they’re noticeably frail.
The idea of almost anything having 1 HP is just silly to me. The cat can kill another cat with one non even especially precise strike? Really?