Agree with first part, not second. I think there were multiple things going on, multiple reasons, and the reason they pulled the trigger was a list. I dont think they view the hitting secondary to defense and pitching tho, and therefore, I disagree with it being about "higher need areas"
I think first and foremost it was attitude and clubhouse culture
I think secondly, they thought the value of the asset would likely go down from there. So not they think they needed pitching or defense more than they needed a masher, but more a chance to cash out while getting a + BTV back.
So I think it was the return. Not these guys specifically , but the fact that the return package had a net + (even if HIcks is underwater), I think they thought better to trade one year early than one year late (like a Belichick trading Richard Seymour type move)
I think they saw the logjam at DH and that contributed
Devers was already aging with the injury lingering. Thats a sign of aging. Also his bodytype
Like someone else said, most of the time when you sign an 8 yr deal, you expect to get surplus value in the front, but have to carry in the back, so the contract gets harder to move when the first 2 years gone, so they were surprised how easily they could move it, and pulled the trigger
Regarding whre the money specifically goes - I dont think about it like that, personally. To me its a pool. It creates more money in the pool, but Im not concerned about dollar for dollar tracking.