No good map should -EVER-, under any circumstance, be balanced for 32 man IR. NEVER.
First issue, 32 men. As stated several times by Robin Walker and team, the game was designed, budgeted and balanced for 24 players. More players tends to break balance in favor of "spam" friendly classes and overcrowd areas in maps that would otherwise be perfectly fine.
Second issue is Instant Respawn. No half-competent team will ever loose their defense in an instant respawn server. There's just no way to. You actively gotta TRY to suck to loose your defense. Simply put, in normal respawn servers you need to kill the enemies in order to temporarily remove them from your way, gaining you time to get to the objective. In IR servers, since everything respawns after it dies, there's no buffer time for the offense to grab the intel and get out (or cap a point, or push a cart) before more people come strolling by raining rockets, grenades, fire and bullets. There will ALWAYS be enemies crawling around by the truckload, since killing them doesn't really remove them from the game at ALL.
Now, in order to balance a map for IR servers, you need to basically FORCE the players to be removed from gameplay (by, for example, creating a long path from spawn to defense point they can't avoid), which in turn massively unbalances them for everything else because, on normal respawn servers, you'll still be forcing players to take that extra delay, on top of their respawn delay...
So, I'm sorry, but you're very likely to find that in that server, meridian will stalemate a lot... Like every other map...