I'll broach this with the other SRC Mods.
as already explained, its generally agreed that the glitches in TF|2 make the speedrun more fun, such as by allowing us to skip relatively boring sections (Sludge skip/Dome skip) and enable high skill and rewarding segments/routing (Super Fastball and its variants, Lone wolf) so there hasn't ever been a high desire for a glitchless category as a result. however since the last time the topic was ever seriously discussed, there have been a good number of additional glitches routed in, so there's some merit to revisiting the topic. cannot and will not promise anything will come from this however.
Moderators have lives, and Titanfall 2 is a fairly popular speedgame. we are often times having 10+ full game runs in the queue at any given time. typically give us up to three weeks to verify your run.
there's a whitelist of modifications allowed most of which are found in Zweek's speedrun Menu Mod (SRMM) but unfortunately no, we can't allow runs with weapon skins. you're obviously free to do them but if you want to submit they'd have to be removed unfortunately
All Main Categories may be run on any difficulty the runner wishes with the exception of any% Master which must be done on Master Difficulty. The General Recommendation however is easy since the routing is almost virtually the same between easy and master difficulty up until Trial by fire, but you have a much higher chance of randomly dying on normal and above to enemy NPCs killing you.