I don't agree at all. I think he lost because of his inability to adjust and change his gameplan beyond a one two and maybe the occasional hook. He was throwing punches back till the last round and maintained a decent activity rate. Say what you want about Dorticos, but he went down fighting, he didn't pull any of that bullshit Lara pulls.
I was really impressed by Gassiev honestly. He reminded me of Canelo in a lot of ways. We saw a lot to him: hand parrying, some slick upper body movement, combination punching, mixing up the targets by switching between head shots and body shots, good conditioning, pull counters, chin, timing, and of course power and stamina. I'd like to see a more active jab and I feel he's a little slow on his feet, but otherwise, Gassiev is going to be a serious threat at 200 and even at HW.