I think it's now prudent to drop Diggins. If you're securely in the playoffs and she's been of little consequence, I suppose you can hold out until your first round matchup. Otherwise she should be a drop over all formats. There are better IR stashes on the market that are more likely to come back at this point. I won't be surprised if we don't see Diggins again this season and I'll be even less surprised when we see her dealt in the OS.
Skylar Diggins was a scratch from Tuesday night's game after a drama-filled Monday on the internet. She is owned across all leagues and all formats, but there is an above non-zero possibility she continues to sit, if the team is shopping her before the trade deadline.