Minions too strong now?

Me and my friends tested the bots on the sentry shields. One minion brought the health of the shield to half. This was 1 minute into the game. In Meltdown, turrets mean nothing anymore. They just tank the turrets and get into the objectives unless the player destroys them. This needs to be fixed, either by toning it down on the minion buffs or making the turrets level up with the minions (or even making the Tier 3 an actual Tier 3 instead of just adding a shield to it).