Stats are facts about what happened with a certain player or unit, when used a certain way or in a certain system, given certain injuries. They are not facts about talent level. Talent level will always be at least somewhat subjective.
IMO this Dolphin's roster is top 10 in terms of talent.
Offense: Tua, Hill, Waddle, Armstead, Williams, Hunt and Ingold as very talented.
Defense: Wilkins, Sieler, Phillips, Chubb, Ogbah, Howard, Kohou, Needham, Holland and Brandon Jones as very talented. (I also think that Baker, Riley and Raekwon Davis are talented but may or may not be talented in the Fangio scheme).
Van Ginkel is also talented but may or may not be back. Trill Williams is talented, but coming off of injury. I think AJ is talented enough to be an above average RT and he looked like it during camp and preseason, but we have yet to see it in meaningful games. Guys like Tindall, Ekuzama, Long and Conner have physical talent but we don't know yet if they will be able to put it together on the field.
I expect to see an addition at LB as we don't have an athletic middle of the field type. It will probably be our biggest FA signing. In addition to bringing back Mostert (who I also classify Mostert as very talented in the right system, limited, but talented) and Wilson as well as a draft pick and possibly a lower level FA. I expect we'll add a swing tackle type to provide some depth behind Armstead and AJ, but I don't expect a big FA addition there.