Towers Should Not Exist
In the current state, it may be difficult to determine exactly what role towers play within the game. However, I say that all towers not only be removed, but I also call for a change that world majorly shake up the current gameplay.
Team size should be increased to 6 people per team. This would correlate with the new system of defending the Nexus. In this system, there would be: 1 Guardian 3 Brawlers 2 Divers
These would be randomly determined at the start of each match. The Guardian would have significant increases to health, but only be able to stay and defend the base. The Brawlers would have increased generic stats, and the Divers would have increased offensive stats. The Brawlers could go anywhere, EXCEPT for the enemy base. Divers could go anywhere including the enemy base, but would have reduced stats in their own base.
Guardians would be tasked with defending the base, as they wouldn't be able to leave it. Brawlers would make sure that the enemies don't get close to the base and try to give kills to the Divers. The Divers would have to infiltrate the enemy base and destroy the Nexus.
Of course, due to these changes, surrendering wouldn't be a part of the game. Due to the nature of these changes, surrendering would simply just be letting the Divers walk right into your base and destroy the Nexus, thus mitigating the need for an official surrender. These changes would make the game much more strategically oriented, and would make tactical decisions more impactful on the battlefield.