I know asking more custom maps to be included are a bit asking for too much. However, there's that one time B0ng happened to say on our shoutbox (not exact quote) when I hosted custom maps on the TmX Special Server, that he'd prefer for the custom maps to get released along with the updates so as to not divide the communities even further
And yea, part of why I don't update my old maps yet are because we never get to test them properly, to see if it fits well with the intended (and unintended) number of players, mostly because of the same reason why some people ask 'What is PUG?' or why they keep crying 'Why is this changed?' : They don't visit forums often
Of course, I don't expect too many custom maps to get released along with the game, much less Coastal anyways. But I'd be happy if we can get some dedicated tester, and probably at one exact time, like how PUG works. 8 players + bots can never simulate the real game