if you change the stats to what you already see them as, it might work.
your map just loads the dependency, so changing this data will result in the game loading your map's stats rather than the dependency's.
A map is fun, when it offers team play, so you can play with your friends. I am pretty sure you knew that already...
Fun can sometimes be if something surprises us, example: 20 banelings fall from the sky and explodes dealing massive AoE damage to EVERYTHING.
That could be an ability.
other example: you hear Day say "trumpets" and your gameplay is temporarily interrupted by "isla del sol".
Random things are mostly fun. Weird stuff is not the dominating thing though. But your definition of a good map mixed with some fast paced randomness would be hilariously fun to play, i recon.
It has to be original, but something with Heroes is always good. DotA, SotIS and all the other Hero Tug of War maps are pretty fun, but they need the REAL twist of fun. Variation. Perhaps 4 teams in a DotA map with 12 custom voiced heroes with epic surprising abilities? I am sorry, but don't know what else to do with your map...
The most fun map out there... I don't know, but here's a list of good ones:
Nexus wars (to an extend)