Thing I like about Stevenson is how he doesn't neglect the body. Guys who are top punchers like GGG, Matthysse, Adonis all do a good job of mixing it up and that's really important to do instead of getting caught up with headhunting and thinking you can just put any and everybody out cold with a headshot. Don George is no special talent but what really fucked him up was Adonis's body attack. His left hand is lethal anywhere he lands it.
Agree, Ghost, about the age and possible chin issues. We really haven't seen him in much trouble recently, the George fight had some interesting moments early iirc, but it was mostly a one sided beatdown, same goes for him in the rematch with Boone, and the Chad fight literally told us nothing that we didn't already know. Cloud can punch and we'll see how he holds up if he gets tagged clean a few times.
The age is also a ? but I think he still looks good and being a freak athlete doesn't hurt (Have you seen how high dude can jump?). However we've seen how quick age can effect people, look at Sergio. One day he looks like a beast and the next his body's falling apart. You lose a step and you're fucked unless you have great technique, especially defensively. He isn't a guy who's got a lot of wear and tear so that bodes well for him. I think his hand problems could be an issue but overall I think the age is a factor that most likely won't come into play just yet. Could be coming soon, though.
Another thing that I think will come into play here is the fact that Adonis actually has pretty underrated boxing, imo. If Yusef Mack could give Cloud trouble for 8rds or whatever it was before he got stopped, then I think Adonis can do the same for 12. Cloud isn't a guy who's exactly defensively sound or quick to the punch and Adonis can stick and move to a Dec if he doesn't feel like trading with a guy who can punch.