You can speedrun anything with any rules you want, just because there's no category to submit to doesnt mean that there's no reason to speedrun. No need to crowd leaderboards with categories people will end up completely ignoring (Any% NMS for example, something literally nobody but viper runs atm)
And if you want to see if sub 55 is possible just watch Viper's Any% run
Go on then, nobody is stopping you from doing Trevor% with MS rules, you're just not able to submit the run anywhere.
well, you can't beat the current T% wr w/ mission skips simply because the rules of T% don't allow them. and it's unlikely that this shit will be added as a new category, too, seems like a boring run to me and probably nobody except for you and (maybe someday) matt will ever do it. i suggest practicing an already existing T%, with good practice you will easily move up the leaderboards. who knows, maybe one day you'll get wr there