For those interested, here is a link to the unofficial UT3 discord me and a few friends made over the years. Lots of valuable information here, including an installer that does all the necessary INI configurations for you so you don't have to mess around for hours tweaking your game to perfection. Also, tons of maps and needed mutators here.
https://discord.gg/tTDdvde
Rumors are surfacing and showing that UT3 is getting updated on Steam. I speculate that it could release on Epic Store in the future with some much needed network updates.