Sticking to a diet is fine but sticking to a diet for a guy who naturally carries extra fat and is that big in order to potentially make 185 is just different. It's absolutely life altering and it's hard to train all day everyday without getting the things your body needs in order to feel normal'ish, so 185 imo is not at all in the picture for him. Mma fans that have never cut weight have this weird belief that it's easy. Everyone is different and weight comes off easier for some and harder for others. I wrestled for a long time and cut weight often, some mma fans have a perception that it's easy to cut giant amounts of weight when in reality cutting even 6 or 8 pounds when your not full of water is really shitty.
It's somehow become the norm (for people that have no clue) to think someone can cut insane amounts of water weight because they see numbers and over the years it's just become more and more. It's not realistic to cut 30 lbs of water weight, it just isn't. For him to make MW is a struggle that I don't think you understand. I'll i'm saying is he couldn't make MW and perform to the best of his abilities and his camp would be absolute shit and that would effect his performance too. It's not realistic. I could see 205 and he could play with that but he has his advantages at HW too, so it's kinda 50/50 imo and if it's 50/50 then why bother.