First of all, I'd like to admit that the map title is a little odd. I got it from a music title "A Little Piece of Heaven" by Avenged Seven Fold. My map variant is located in the sky of forge world, is compatible for all gametypes except invasion and race. It is a very symmetrical map with most weapons being near the center. Don't Fall.
One immediate problem I see is a problem that I had in one of my earlier maps (wasn't that good). It looks like there are too many narrow pathways, and on a sky map that isn't good because it is too easy to fall off. Also a problem in my map, yours as well, is it seems like the top bridge (with the glass sails) can hold too much power. I can't see any way to get up there except with a jetpack, but did you put a soft kill barrier up there? If not, any player with a DMR can spawn camp the other team really hard, less in a FFA.
hey final I agree with the earlier comment as fall deaths are a nasty issue (AKA CAGE BLOWS), mostly because it leaves no breathing room from grenades and little strategy to work with. In terms of power positions, as long as there is 3 or more ways to get to that position, even the most veteraned player will have a hard time holding it perfectly. Multiple levels of the map can create camping, so try to create 3-4 postions of equal hieght with maintainable positions, some you want to counter-act each other. This can make great symmetrical gameplay as I have always seen in most maps I build, Dhg final cna vouch for the gameplay on some of my maps. Even an asymmetrical map as long as it has 3-4 equal position's of power (provided there is 2-3 ways to that position) can make great gameplay, possibly for MLG too.