I consider it a issue that security through mining relies on TX fees in the future. There should be some sort of on-going emission to fund miners in the future.
I think this is a fair point. It makes the future much less predictable. There's no guarantee that the long term economic design (a hard limit on supply) pans out as expected
This question has been discussed before and with no definitive solution in sight
For example, I maintain that the concept of "sound money" is not a very good one, especially if we talk about a currency aspect of money (as opposed to its store of value one). But that's kinda obvious, provided you have a half-functioning brain and do not obsess with the idea of fiat being inherently evil. But I don't know how you are going to replicate in a cryptocurrency the capacity of fiat money to adjust its supply according to the needs of the economy (see the concept of endogenous money to better understand what I'm talking about)