I would love to see better moderation tools. Most of the shitty content I've had to deal with are from newer/multiple accounts, as well as the older accounts that are sick of the trolls. Our AutoModerator shadowban list and our ban list is so ridiculously long I can barely scroll it. It'd be amazing if we didn't have to rely on a bunch of other tools (toolbox, RES, AutoModerator) or consider building our own tools (subreddit history scraper). It'd also be amazing if there was some site-wide automatic action against certain throwaway accounts so we don't have to clean up _after_ the 4th attempt at some idiot trolling us.
I would also love to see a better take on Reddit 101 too. We still get comments like "I'm a male and why is this on my reddit page" and people that just barge in without reading rules to post things against our rules (like a ton of misogyny _and_ misandry). Some of this is inevitable but it's pretty annoying that there isn't much we can do here either other than deleting things after the fact.
I don't think that those two alone will improve the site significantly, but it would be a burden lifted for default mods, and that might help clean up parts of the front page. Maybe. I don't even want to think about how much time we spend on everything from figuring out trolls to writing warning notes for each other, to discussing some idiot user trying to dox one of the mods. It'd be time we can spend doing other things for the subreddit. That would be nice.