He needs to work on his timing and his accuracy though. If that left hook lands more frequently it's game over for almost everyone.
You can only ask so much from Dillian who has to rely on his determination and power by fight-boxing opponents like Chisora and Parker who have WAY more experience in Boxing. You can't learn something like boxing 4x faster than your peers. Parker has 15 years more experience in boxing, and a full pedigree in the amateur ranks. Dillian has hardly any by comparison, so a clear desicsive victory isn't always going to be the result! How do you expect him to decisively beat someone with 15 years more experience and 4 years younger? Come on man, be realistic. It's a feat to just outbox and win them narrowly, which is what he has done.
I think he beats Wilder, Obviously Wilder could KO him if he catches him but I think the is a reason Wilder dosent want an easy $5 million against Whyte.