I really dont think neal ever had any real chemistry with anyone. He was almost always an independent contractor out there.
Not that I agree entirely but something to consider is that chemistry aside, playing with good players can obviously boost statistics (especially assists).
My personal opinion as to why Neal was shipped out is because Nieuwendyk didn't think he was a true winning player. I'm sure he'll do fine in Pittsburgh, and may even win a Cup in short order, but I just never got the sense that he has it. That in itself is not a problem but it can be if the player thinks they do.
Hornqvist is a very good asset. He could flourish and help them win a Cup. Goligoski probably never plays more than 2 more years in Dallas.
With as good as the team looks poised to be ... they could easily allow him to walk for no assets at the conclusion of the 2016 season rather than trade him for assets at the deadline in a playoff race.
I'd hope they'd at least strongly consider moving him next summer ... like this Spezza situation ... so they can get value back for him.
Maybe I'm wrong though and proves to be a great 3 or 4 if say one of these young guys step up. I just don't see right now long term potential in Dallas. Too many young D and not enough spots ... especially for a a $5 or $6 million D which he might be.