I think it is a lost cause really. For ERC tokens is fine, but everyday there are 50 new variants of bitcoin, ethereum and two new (useless) chains. It is impossible to support them all even for the most dedicated team.
With how many forks of bitcoin there I'm surprised someone hasn't built a wallet that automatically pulls all the relevant constants from Github and adds support for coins on the fly. Would be quite the revolutionary technology. Anyone wanna do that for me? 