First to say, your map looks very promissing so far.
A point, that I realy like about you efforts, you first thought about gameplay and then later about the art.
An important point, that I want to suggest, is the environmnet. You should realy try to decorate the areas around the gameplay zone, so that the whole gameplay area fits better into the landscape. In alot of custom maps I have the feeling, that the map is an quadratical island (mainly the remakes of the the old FH 0.7 maps).
About the problem with testing the gameplay: what about a little event for testing the gamplay. Maybe on a pubby friday on WAW-server a suggested by others? I think a lot of people would like to have a little change in map rotation
. And then later suggestions could be given in this thread.
Realy looking forward to your nice work