I think the first Kostitsin was fine, the 2nd wasn't. As we saw from their former team. I didn't like the addition on the 2nd brother.
As for Weber; it was documented that they were given warning about the offer sheet (although short notice), he was working on a trade which leads me to believe he knew he couldn't sign him. It was too little too late in attempting a trade and sounds like he was holding out for more then he could realistically get (my assumption).
Now, I agree with taking risks, and maybe he had some bad luck involved here. With that said, they are either going to go into next season without Suter AND Weber with nothing to show except a re-build in a tough hockey market or will commit an insane amount of money to Weber for 1 year and then probably have to try to trade him when he asks for it.
A major part of their success is going to be gone, they will have taken two steps backwards. As an Owner I would give someone else a chance to create the team and use those 1st rounders to strengthen the team.
As I said, two many big risks/gambles in a short period of time. Can always say "what if, or it could have" but the fact is it didn't and with Weber possibly gone, their identity will take a major hit. I just don't think his risks were calculated enough.
A calculated risk is bringing on a guy like Sykora, or Ethan Moreau, etc. Low risk good reward.
I understand your points and respect them, but I think too much damage was done for him to stay at the helm regardless of which way this goes with Weber. It is tough for them to match that contract knowing they may have to trade Weber next year.