IMO the leagues should stay as they are. There are competitions based on leagues. How they will be done if leagues are changed?
HWBot needs to solve the chiller issue without relying on people's honesty, but on a dedicated trusted software. Only then, the competition will bring back the adrenaline. If you manage to deal with registering the temps and clocks during the benchmarks, the real skilled overclockers will raise and the beginners will get more addiction.
On the other hand, a resident software may ruin the score. Let's take SPI32M 5G for example. With all the tweaks involved, a software that uses some memory will probably hurt the result. Unfortunately, not using the software will give many a reason to cheat in a way that can't be seen with naked eye.