yeh, i haven't got a problem with tier 1+2 but i have got a problem with inhibitor turrets and nexus turrets like seriously these are the last defence line and they are that bad, inhibitors should be pretty tough and do some form of AOE damage (or the inhibitor itself does some AOE)
the nexus turrets should have something like ''together we stand, divided we fall'' so when both are up there tough, and if all inhibitors are destroyed they give your minions a baron-like buff (but weaker) if ALL inhibit are down should give you 1 line of super minions or something. to help repel, give them 0 damage vs structures though, just as a damage soak for minions.
- if one is down then the other is useless alone son like now.
I'm just spitballing but this is the type of shit i would do, maybe i would if everything was down with only the nexus standing give you a dragon like combat buff and call it ''last stand'' has X CD and only is active in a radius around the nexus to give teams a way to fight back and try to turn the tide.