I just think the situations have to be considered. What the Joneses have shown is that they will pay top dollar for their own free agents, if they believe their own free agents are worth top dollar at that time. They will cut (or trade) players they think are not living up to their contracts. And they will not pay much to bring in any outside free agents. This has been their philosophy for years now and they are sticking to it.
With Tyron, they drafted his replacement and seemed to be pleased with what Bass, in particular, showed at guard, so they moved on from an older player with injury issues.
With Pollard, Biadasz, Gallimore, etc., I don't think they felt their level of play equaled what they would get paid (kind of like Byron Jones when he became a free agent, and there are other examples as well).
I don't think there were a lot of players they wanted to keep this time. I will be surprised if they don't replace a few more of those players with cheap free agents. I expect a running back at the least, possibly a third receiver candidate, possibly a center (although I think they see Hoffman as the placeholder), probably a DT (depending on how they view Golston and Fehoko), possibly a DE (depending on how they view Golston and Fehoko).