My interpretation of the sequence of events involving the decision to keep Boucher and the rest of the coaching staff:
1. Dorion tells media on April 12th that changes need to be made, but that he won't make any decisions about Boucher until after the draft lottery. He says Boucher is still a good coach, despite the team finishing 30th.
Translation: Dorion tells Boucher you sucked this year, but you had a great season year one, so I'm giving you 2 weeks to come up with a new plan or you're gonzo. Why would Dorion need 2 weeks to make up his mind? It's not like he was busy. All he had to do was sit and pray for Dahlin.
2. Boucher makes his presentation to Dorion following the draft lottery.
3. Dorion announces that Boucher and his staff will remain with the team and that Guy will be responsible for the PP, etc...
Translation: Either Guy Boucher is a hockey savant with a beautiful mind, or he is the greatest salesman of all time. I doubt his post draft lottery meeting with Dorion went as well as the 8 hour love fest when he first interviewed for the job, but he must have wowed him enough to save his job for the time being.
So when you ask yourself what kind of changes will we see next season, I think the system, PP, and PK will get a complete overhaul, otherwise Boucher would be gone. Why else would Dorion give him his blessing? The system clearly wasn't working last year with the personnel we were deploying and the players seemed disengaged. I also think they will hire a new coach in Belleville whose style blends well with the "new plan". If Boucher falters next year, then the Belleville coach will assume interim responsibilities.
Anyway, that's my take on how things unfolded. Should be fun to see what Boucher has in store for the team next season. He has 4 months to refine his new plan, so let's see what he's got! If it doesn't work out, he always has a career in sales.