Honestly, Holden's earned a spot IMO. He's a pretty dang solid third pairing guy who has stepped up in the playoffs last year and did so again when EJ went down this year; while also showing that he can be an adequate Barrie partner if they are used in the offensive role that pairing should be and he doesn't have his head up his ass like he did the first half of the season. At his price and his willingness to do whatever it takes to stick around, I think he's becoming a nice depth guy to keep around, like Malkin has done up front. I wouldn't be upset if he left, but I also don't desperately want it to happen like I do Guenin/Cliche/Gervais, and we'd need to have an upgrade lined up.
I also like having Stuart on this team. He may suck with the puck, but he's been great for the PK, gives our D a mean streak we lack otherwise, and is a fine stay-at-home type third-pairing-guy at ES. Not to mention that I think he'll be a very good mentor for Siemens and/or Zadorov if they're ever on the team with him. Again wouldn't be upset if he left, but I don't think it's something that needs to happen unless we need to make room for an upgrade.
Hejda's in a similar spot, I like what he can bring in a very specific role, but he needs to be in a smaller role than he has played for us and we need to bring a real EJ partner in regardless of if he stays or not, so he could need to go to make space.
All in all I would be pretty pleased going into next season with:
Martin* - EJ
Hejda - Barrie
Holden - Stuart
(Redmond/Noreau)
with Siemens/Bigras competing in Lake Erie to get a call up as the season wears on...assuming no ROR-trade. In case of a ROR trade I don't see how we could keep all of the bottom 3; both from a fiscal perspective, as we'll have to pay up for a ROR replacement in UFA; as well as from an openings perspective, as the young LHD we can get for ROR is almost certainly going to start next season in the bottom 4, probably on the third pairing with Holden or Stuart. So unless we want Hejda playing EJ again we'll still have to find a hejda-upgrade in UFA.
But if they did re-sign ROR I'd be happy with that D until our kids can force their way into those jobs as letting Dmen over-develop is never a bad thing; and in those smaller roles Hejda, Holden, and Stuart could a very good job with EJ, Barrie, EJ-Partner, and our forwards ahead of them, and Varly/Picks backing them up.