Re: Clowney, then what?
Preface: I only read the last 3 pages.
Clowney is the best player in this draft. That shouldn't be a question. You can question his effort or conditioning, but you are lying to yourself if you question his talent.
With that out of the way, I take Clowney THEN I take a LB like Mosley. I don't trust Cushing to stay healthy, and even when he is healthy, there is no talent around him to make plays. Think of it like San Frans front 7. Clowney is better than Smith. Cushing is in the same league as Willis, but they have Bowman as well. Add a second top tier LB and that shores up our defense. That's before we add in the best defensive player in football. Cushing and Mosley can both play in either scheme.
Address the QB through a trade. A rookie QB isn't going to cut it, and there isn't a QB good enough to be the face of the franchise. There is no Andrew Luck. Build the defense, trade for a competent QB and dominate one side of the ball. Follow the SF and SEA models. Elite defense and competent offense. Any QB is walking into an offense with an All-Pro LT, C, WR, and RB, as well as another 1st round WR. Sure, if Andrew Luck was there this isn't a debate or a question, but there isn't a talent like that to change a franchise so you take the BPA. The BPA is Clowney.
The significant problems we face cannot be solved at the same level of thinking we had when we created them.