All very odd this isn't it. Three main possibilities for me. 1) He's simply been sacked and there is a wrangle over the terms of the departure given he's mid contract. So he's not technically been dismissed yet hence the interim piece. 2) I think it's long been a plan to move Dai upstairs and have a head coach move in. This could be this playing out but if this was it I can't see the announcements would be done in such a ham fisted way. 3) It's a health issue and he's just stepping back for a while before re-taking control. It could be one or three for me. Sincerely hope it's not three from Dai's point of view. However I'd also be really disappointed if he has been dismissed as I personally think he has and continues to do a fantastic job.
I cannot see it is #2. The replacement would have also been announced.
I also cannot see it is #1, as the HR 'way' is always to pay off the contract and ask them to leave now.
It might be #3, but they would have said so.
I think it is #4. He got re-involved in coaching when the deal with Danny Wilson fell through. He probably didn't want to do that and said so at the time, and he has simply had enough. My guess is that Wasps have a head coach lined up. If it was Howley, there would be nothing to stop Wasps from saying that. Something this weekend may have triggered it. Maybe Scotland are having second thoughts about their coaching setup? Maybe they have withdrawn the Glasgow offer to Wilson? Something has kicked off in the background that has enabled Wasps to do this now.