Pretty much agree with all of this. Despite some criticism though, I think they're in a pretty good spot overall.
{quoted}
I feel like the inner towers are much more difficult to defend due to their positioning on the map and the damage they deal.
I think the positioning is the big deal here. Particularly, it's really hard to rotate between them without being caught out or taking a route that's so long that the enemy is going to take it down while you try to get there.
I'm not sure if that's a good or a bad thing. If you overbuff T2 towers then stalling at T2 becomes the new stalling at inhibs.
The nexus towers though go down really fast it seems in even games. Maybe it is the dragon buffs or the damage out put of champions at the later point in the game but I feel like those towers in particular need to have some resistances or deal a bit more damage.
I feel like that's more a result of supers being OP.
It's a bit of a conundrum, though. Part of having an inhib down means if you don't defend that lane you're gonna lose a nexus turret. But that means if there's also enemy champions on your nexus turrets, they go down super fast. Buffing nexus turrets helps with the latter, at the cost to the former.
Would it be weird if nexus turrets got stronger when there's enemy champions nearby?