One thing I would understand is if the Preds at least made polite inquiries on the UFA market, but just couldn't find a fit. The pickings were admittedly slim in terms of scoring wingers. I would fully understand not wanting to pay JvR $7M. I would understand not wanting to pay Neal more than he got - and knowing how prickly he can be would understand if he was still a little miffed at being let go in expansion and not so inclined to come back. You could try... and still not come up with anything that made sense on the efforts to upgrade the scoring winger. Fair enough.
On D however... I know on Day 1 you can imagine that even in the group of younger guys who signed more reasonable deals - Pateryn, Moore (5 years is a lot tho), Hickey, Holden - those guys might like to wish they had a clearer path into top-4 ice and not want to sign here. But as we get to Day 3, 4, 5... I really don't think there's too much excuse for not signing a "leftovers" d-man. Hamhuis, Enstrom, those guys... they can't all be holding out for top-4 roles or long-term contracts at this stage of the game when the music has largely stopped.
It's true... you could just wait and see if there's an injury on D during the season that forces things, or if Irwin/Weber/Bitetto stumble. But... by the time that happens, you're behind the 8-ball and paying a 2nd round pick or whatever in a trade for a guy that you could have signed in July for a song.
I think they're doing a disservice to their stockpile of futures assets if the approach is just to wait and see and address things with deadline rental trades. For sure there are going to be players available in trades... but at a cost which digs further into our already-depleted stock of prospects and draft picks. The team might still find a need to explore that option, even if they sign somebody now. Who knows. But signing somebody now at least mitigates against that possibility, at no additional risk or cost. They have enough cap space that signing somebody at this stage still leaves a big cushion for further moves.
The only excuse for not adding a D now to me is if just nobody wants to sign with us. Or somehow ALL the remaining decent UFAs are holding out for unreasonable term. Which seems unlikely at this point.