[Suggestion] Buff Towers HP But Make More Split Pushing Effects Work On Them
Basically, give towers more health.. but at the expense that split pushers would be more effective at taking towers & inhibs. Make things like Yoricks' Q, Jax's W, Renekton W, Darius W, Riven's passive, Aatrox's W passive, Braum's passive damage, Gnar's hyper passive, Nami's E damage, Teemo's E poison, etc. capable of proc'ing and damaging towers & inhibitors.
There are already a lot of champions who have effects that can damage towers (Blitzcrank E, Diana's Passive, Ekko E, Garen Q, Hecarim E, Nasus Q, Talon Q, Tristana E, Vayne Q, Vi E, Volibear Q, Xin Q, Ziggs W). I believe that all champions have abilities like that should be able to use them on towers.
Champions who aren't geared towards damaging towers will take a bit longer to bring them down with the increased health, while champions who are designed for pushing will only take slightly longer than they normally would have anyways. This will generally keep towers alive a bit longer without hindering champions who are designed to be taking them.