I'm hopeful that between the latest patch's large number of custom changes and custom-specials-no-equipment tournament mode providing large quantities of data for another customs-centric patch, players will have more of a reason to care about customs now that they're being balanced like everything else.
Really, I think there are only 3 (maybe 4) customs that need to be touched for most claims of "jank" to vanish. Kong Cyclone (nerf autocancel), Heavy Skull Bash (remove instant partial charge on smash input, also fix momentum glitch), Timber Counter (something involving the sapling, IDK what though, maybe shorter duration or vanish on trip), and Extreme Balloon Trip (explosion size already reduced, maybe nerf Villager's vertical boost on detonation next if necessary). If that happens, then I think customs would be in a very good place.