Sorry for the delayed reply, I was busy yesterday evening.
He missed on Panarin, yes. That's what we're going to be angry about though, a single miss on a star player? You're going to be upset a lot. The Islanders are second fiddle to the Rags and will be forever unless they turn to absolutely dogshit for an extended period of time while the Islanders are a playoff team every year. It is what it is.
There are two things that make me hopeful about Horvat. The first is that he can't possibly be as bad as he was once he got to the Islanders and having a full summer and training camp should help. The second is that the salary cap will finally start to go up now and will make some of these deals better over time unless something catastrophic happens.