My list to improve the play store process that requires $0 additional dollars from google and would fix 99% of issues:
1) give developers a period to respond to the complaint before takedown (maybe 1 week)
2) if they respond, make a decision within 1 week.
3) show all this information in a portal to see basic information like your app is facing a review, pending google response, etc. Really basic stuff.
4) allowing you to attach information in responses (one situation I have been in, the trademark office had ruled in my favor but I literally didn't have a way to provide that ruling in the appeal).
5) having a premium developer support program that provides good support. I think most serious devs would prefer to pay $300/yr to have good support vs what they have now (zero support).