I think Dana is making an example out of Daley since he's changed his mind on so many of his. "lifetime bans" before.
And he should look at mitigating factors. Kos was supposedly calling Daley a "fa***t" during the fight, which is against the rules. It doesn't justify what Daley did but he's been banned for years. His career has suffered tremendously already.
Daley lost last year to a guy that just lost his UFC debut. He doesn't belong in the UFC. If he went to WSOF and defeated Palhares and Fitch, then they should sign him, but right now he's just not good enough.