I do wonder if a team would bite on a Dillon based on his physicality if the UFA market this year gets too pricey.
(People here don't like the idea of playing pesce on the left temporarily but I'd be fine with it).
And I think if you told Dillon that the plan was to have him at 7D (because you believe Nemec, Dougie, Luke, Pesce, Kovy and Siegs are better), he'd be willing to waive for a team that would give him regular minutes, especially if he wants another contract after this one.
If you move him out, along with grabbing an RFA young C, you can probably bring back allen if you want or have some more expensive scratches in case of injury.
In terms of Dallas and bourque, I wonder if a guy like Casey would be of interest.