We have seen that many times.
Always is hard to introduce new maps, but im sure with time ppl will get it.

I have played some games in really nice maps (even 4vs4) and we did not agree in to be there at that time. We played just with the ppl on the foyer. Well, in some case we had to wait a lot (coz swoosh pressed wrong key ), but again we played 4vs4.

As soon as ppl start to don't be able to join a game coz of no map we will see them dl the mappack fast.

So keep hosting new maps, even if u have to wait a bit...