If the issue is cap space how does this solve it?
trade for a top D prospect still on ELC, or trade for a lesser defenseman but also include a cap dump. That's why Lindholm for Trouba doesn't work, it solves nothing for Anaheim in the cap department. Trouba isn't cheap enough to offset the value difference and isn't good enough to ask for anything more from Anaheim.
I could see a Lindholm + cap dump for Reilly/Risto type deal being appealing to Anaheim, but both Leafs and Sabres would just stick with their guys who may be worse players today but have potential to be as good or better while already being locked up to decent contracts. Why take the risk. I think Lindholm probably gets locked up in Anaheim, he surely has received offer sheets that he hasn't signed because he wants to be a Duck, but it's probably why that reported $700k is such a sticking point. If he has an offered tabled that pays him what he's asking already why accept a dollar less, his leverage is only increasing as the cap problem keep snowballing each day he's off the roster and as long as Anaheim isn't playing great he looks better and better while Murray looks foolish.
If it became known Lindholm wasn't signing in Anaheim would Ducks consider a good defensive prospect and a top 6 forward for Lindholm and a dump or will they stick on the top young defenseman selling point? I just don't think anyone with one of those NHL defenseman will risk trading an asset with a known contract for an unknown like Lindholm. Maybe his ask goes up if he's traded somewhere he doesn't like, just too much risk. I'd love to see a Risto/Lindholm pairing but I'm guessing the ask is around Reinhart if Risto isn't included. Maybe Guhle Nylander Fasching and a first, stock up Anaheim with cheap players, but really any defenseman not named Risto should be on the table it just depends how much money they want to take back.