So yours ia :
Keep the 100 then get an additional 10% based off actual point difference?
Keep the 100 then get an additional 10% based off actual point difference?
Ugh. Sometimes group thought is more trouble than helpful. However if people choose to eliminate the points for a loss rule, the points per win could be altered to a 10% gain. Thus there will always be a base 100 points for a win, but if you faced off against a higher ranked opponent and won, you might gain 110, 120 or even 150 points for that win. It might incentivize people to seek out the higher ranked fighters rather than continually fight the base 100 people and plod along.
It's a bit late now, but a system that Rilla used which I tend to agree with is having character acceptances private until the start.
For example, I may be unlikely to produce a character now which is particularly vulnerable to any of the character's posted thus far, to increase my chances of winning.