I think AJ's contract is going to be a problem with resigning some of these guys. We snuck under the cap by moving his money to future years, which means we've got ~$8m to find for him next off-season, getting rid of Demeco offsets that leaving us with the status quo.
If we end up in a Torry Holt situation with him, it may be better to keep on stockpiling the D for a couple of years and go into a full-blown rebuilding mode on O, setting up a strong line, maintaining our running game, and allowing that, and our strong D to keep us ticking over while we try to find a QB and new receivers.
OTOH, its not like the flat cap affects us any more than other teams, they're all in the same boat, so these guys aren't going to find a competitive market over the next year or two, sure you might find one or two of them lost to an egg's in one basket type team, but for the most part we should have enough options to choose a direction and be successful in it.
The key is drafting, if we were to throw out our current depth chart next season, we'd be likely to make the playoffs in our division, so draft bpa vs future need rather than plugging conceived holes right now, and look for those guys to contribute in year 1 (like Barwin did for instance) and become key players down the line.
Guys I've seen listed in this thread that we could stand to lose if we draft well enough are Quin, McCain, Cody, Caldwell, Butler & Smith, that isn't ideal but we need to focus on having the guys to step in behind.
Its a tough task, and we won't know how exactly how well we've managed it for a couple of years yet.