@edmund.angles:
I would be interested in playing a round of The Plague, and this modified variant sounds cool. In face-to-face, there is in my experience no need for additional balancing, so a simple power role for town might be enough online.There are a lot of setups/themes I could run when I have some modding experience on-site. I have modded at least one face-to-face game of each setup, but tweaking for online play is still in progress:
Quantum Mafia
Although I know of Quantum Mafia (QM) from other sources, its origin seems to be the creator of the puzzle Schrödinger's Wolves, according to this description page.
There is a finished game of QM here on MS, but it used slightly different mechanics and less special town roles than my version. In QM, more special roles mean that more scenarios can be sorted out per night, and that players flip earlier. This makes QM less confusing for all players, and additionally it increases the odds of a town win. (Without many special roles, scum won too often in Quantum Werewolf, and also won in the QM linked above, which is why I play QM with more special roles than only one cop.)
Time Travel Mafia
The origin of this variant seems to be the German Mafia website http://mafiaspiel.de. At least that is where I read about it. Again, I use slightly different mechanics.
It basically works like this: Most of the special roles have a time machine, and can use their actions in the past, present or future. With this technique, it is for example possible for the doctor to protect a player in a past night to effectively revive them. Also, performing actions in the past can cause time paradoxa, which can have a multitude of possible outcomes.
WARNING: Playing one of the above two Mafia variants can cause permanent brain damage. If you want more details, ask!