Nexus turrets may as well just be decorative ornaments.

Would you be happy if the next tier turret in a lane received a temporary defense buff after the tower before it dies? This would slow down killing multiple tiers of a single lane in quick succession.

Would you prefer an activated buff like Dota 2 has? Or would you rather they simply be much stronger at all times?

Any other solution you would like to propose?

The only purpose Nexus towers have is to keep you from killing the nexus without minions. This is as it should be; games of League are meant to end.

Yeah, the nexus towers used to be lasers towers IIRC that ramped up in damage over time. Then they decided that people should be able to CS under nexus towers so they made them attack like normal towers so CS habits didn't change, but that means they attack slower and do less damage than they used to.

If they wanted to do that, then I feel they needed to raise the armor/MR (not sure if MR helps protect towers from AP damage on auto attacks??) on them or increase the attack speed so that they don't die to 1 super minion.