So, I just came up with an idea of a refined version of Gotta Sweep's mechanics that may or may not end up being implemented in BFNS Ultimate, and here's how he could potentially work.
Rather than sweeping up all characters he encounters, which could lead to bugs sometimes in older versions where characters would get stuck on Gotta Sweep after he finished sweeping, instead when Gotta Sweep goes out of his closet to sweep, perhaps he would only pick up to 3 characters (and maybe excluding the player) at a time, and after holding a character for a random amount of seconds (maybe between 5-10 seconds), he would release them from his sweeping hold and not be able to pick them up again until the next time he goes out to sweep.
Adding upon this concept, perhaps there could be a challenge floor (or in a secret floor) where there are multiple Gotta Sweeps, and rather than picking up characters, these specific ones would teleport any characters (including the player) that they encounter while sweeping as part of the challenge.
Overall, I think these changes would help make Gotta Sweep more balanced/unpredictable and unique/different from how he usually works in other Baldi projects, and I've thought of refined 1st Prize mechanics as well, though I'm going to wait to share ideas for those until after Beta 1 is released, as 1st Prize is not planned to be added until a post-Beta 1 update for BFNSU.