Wasn't agreeing exactly. You said they abandoned the rebuild when they signed Tavares, Nylander and Marner. That's incorrect. They abandoned the rebuild long before that.
As we already discussed, we weren't in a rebuild, and that is not a very good 1-2 punch for a team looking to compete in the playoffs. Especially when Kadri gets suspended. Matthews-Tavares is much, much better. We also had nothing beyond that. Gauthier was pretty much our only other center or legitimate center prospect in the entire organization. And Kadri wasn't going to be cheap forever.
He didn't "give in" to Nylander though. He held firm at a price that was reasonable and worked for the team, and refused to go past it - forcing Nylander to sit for half a season and potentially more if Nylander didn't accept. If anything, it would have scared the other RFAs, but it didn't, because Nylander wasn't really relevant to their negotiations - completely different level of players. Also, this cutthroat mind game mentality is so TV show drama. That's not how things work in the real world.
Whether or not you agree with those choices, you're largely naming things done out of choice, not necessity. The complaints about these two are grossly exaggerated, but even if you think they didn't work out like you wanted, it's better for that to happen with cheap, short-term depth than overpaid depth that become long-term anchors.
We had four bottom six players making more than 1 million last year, and Spezza also probably could have easily gotten that if he wanted.
I mean this is the biggest thing. Thankfully we have some coming up soon, but the last couple years were made especially hard by our drafting sucking during the Lou era. ELC players are one of the best sources of value exceeding cap hit.