Oh I realize he isn't worse than those guys, but no team is going to give up full value. Brannstrom should have more value, but Ottawa isn't doing themselves any favours by not playing Brannstrom in the NHL right now. They're basically saying 'our coaching and management staff don't believe he has any long-term potential here, and we have a better chance to win with MDZ, Holden, and Brown in our lineup'.
I think there's a huge difference between Batherson and Brannstrom's situation. One was 'we don't want our young guys to be stuck on a tirefire of a NHL team' when they can develop and build chemistry with our future core in the AHL. Compared to simply keeping Brannstrom in the AHL to slow-cook.
I think you're misattributing the reasoning behind why Batherson was kept down, and the coach and GM have both said that it was precisely because they didn't want him up until he was overdone, and have echoed that sentiment about many other players, including Formenton, Sokolov, and JBD.
It's clearly an organizational philosophy, they have straight up said that specific players won't start in the NHL regardless of whether they are top 12 F/top 6 D on our team. Add in the fact that he's a DMan and that they have 7 guys on one-way deals and it only compounds that fact.
And they are absolutely NOT saying what you're saying they are. To act like it is a simple decision based on who is best is bordering on deliberate obtuseness. In fact, they have openly expressed an organizational philosophy to the contrary. Sens aren't trading Brannstrom if they don't get value, because why on earth would they? He will either be dealt for value or he will grow into a role slowly with us. I suspect this will all be made moot very soon, although I do still think Brann will be traded.