I think I have a nice idea for a different way the "Memory" skill could work. I think, instead of having it calculate how you perform with a mod (which feels a little out of place compared to all the other skills and how they work), it would be far better to have it calculate how good you do on a map after you have played it for the first time.
The basic way it works is: you play a map, then the site remembers how well you did on said map, and then the site compares your next 2 or 3 plays to how you did on your first attempt. If possible, the site could also calculate how far apart those plays are, and the longer the time, the more the skill is affected, with there being a time limit of course. If the site kept calculating the time forever, I feel like it would cause massive overweighting or something.
It's just a cool idea I had a little bit ago, it feels much more fitting to have the "Memory" skill work in this way, as opposed to it being affected by mod performance.
Thanks for reading. Hope you have a good day o/