I think adding an extra ramp where the large crystals on the sides would go along way with improving the map experience. It's just far too dangerous to attack them unless your team has the ramp as jumping down leaves you trapped, and taking the tunnel leaves you vulnerable to being pinched by the third time. This makes everyone play it safe and only engage other teams when the large middle ice spawns or when smalls are about to spawn. Rarely have I seen a team trying to sneak in from behind via the center ramps actually achieve anything. Usually they end up getting wiped out anyways from players spawning nearby and they inadvertently help the team they didn't attack.

The small crystals often determine who wins, as the team that prepares to capitalize on them will pull ahead and stay ahead. If anything, these also need to crop up more often than just all at once in the middle and end of the game.