Some thoughts on making turrets tougher

Since League is ostensibly a turret defense game, Ive always thought the actual turrets should kind of be a significant part of it...

Currently they arent much more than little speedbumps after the 20 min mark. While I dont think towers shouldnt scale heavily into late game, they should scale at least a little. certainly more than they do now.

A couple ideasI have that might make backdooring harder, but not heavily impact team pushes(aka reward actual teamwork)

.Put a cap on how much damage a turret can take from a single champion attack.

This amount could be adjusted as needed, but as an example lets say towers cant take more than 200 damage from a single champion attack. can no longer 3 shot them, can no longer face tank them while taking them from 100 to 0, but a group of players can still chew away at them pretty quickly. I also dont think this would render the dragon and baron pushing bonuses moot. Plenty of champs would not be able to hit the damage cap with autos. If you really wanted, you could have these buffs encrease the damage cap from 200 to 300 per champ for example.

.Towers heal slightly when they damage champs.

This one might be a bit strange, but it could make things more interesting. This might add some depth to the choice of whether or not you want to dive for kills. On one hand you might get more money, but on the other you are going backwards in terms of objectives. The biggest problem that comes to mind right away with this one is trolling... a guy going around litterally feeding the towers would be an issue, but I dont think it would be much more crippling than having a 4v6 in the first place.

.Inhib/Nexus towers deal some AOE damage.

Towers create a moderatly sized damaging AOE around the target they are attacking. This might be a small percentage of the damage taken by the primary target, and probably wouldnt need to ramp up in damage. The idea here would just be to make these inner towers a bit fiercer, and possibly make the final stand more epic.

Obviously I wouldnt want all of these to be applied at once, but they are some ideas that might make towers a thing again.

Does anyone else have some turret buff ideas?