Every time I go to my watchlist 50%+ are edits that were reverted by some anti-vandalism bot or user. I can easily tell those edits from the rest by the 0 bytes added mark, and also because I already recognize the names of usual anti-vandalism bots. However, I think it would be a step forward to have a filter to hide all edits that have been reverted, so that the watchlist only displays changes that are worth seeing!