He is eligible to come out for the draft this year. I think he stays one more year and leaves for the NFL.
3-4 defenses are now the norm in the NFL. Smallwood will grade out as a premium 3-4 backer. I think he can play inside and out. He is stout against the run (I have seen him stand up O Lineman several times) and is a very effective pass rusher. I actually think his best spot is as an OLB in the 3-4. He can seal the edge in the run and could be an 8-10 sack guy.