Defense is a lot easier to coach than is offense, in my view. We will have some size, a modest level of athleticism, and some coachable players who can be, as a team, molded into a defensively capable (not great) team. Keyword: team, as in team defense. I strongly (as in 100%) doubt that we are going to have a highly-ranked defensive team next season. We will instead rely on being a better offensive team than are opponents. And -- this is the second point -- we will rely on defensively slowing down the other team, not shutting them down.
Not my personal preference as an approach. But it is a good one, and much more importantly, that is clearly the way this team (next year) will be able to be successful. Slow down the other team a bit, and overwhelm them with a balanced offensive attack.
I think this is going to be a pretty good team next year, using FigherOfTheNightman's schema from earlier today.