Your healing is the stufftiest I've ever seen, you don't actually use the brick, you use a touch event on the brick it's ON, meaning enemy players can put up a loving sentry in the enemy spawn and heal themselves whenever they want. Speaking of sentries, you have got to be joking about saying that the metal mod was not well received, because you know why? It made it FAIR, and made sentry spam not possible except if you actually could use it, which 90% of players can't. The map is only a mild replica of the real map, and has way too many exploits and height glitches you can get to to make it a good map in and of itself.
/rant