It is a very good team they built.
It might not have been built for the long haul, but big deal.  The Seahawks were all home-grown talent, all young cheap players, and they have as many championships with that core as the Broncos. 
A lot of teams have dipped their toe in free agency, to make that final push, and fail.  Most, in fact.  Broncos hit it out of the park in free agency.  But they also scored with Trevathan, Marshall, Demaryius, CJ Anderson, and Wolfe.  Great draft picks.  This was NOT just a team built by free agency.  kind of a perfect melding of the two.  
If I have one criticism, it's that they could have locked up some of their own players with long term deals.  They knew teams would have loads of room, and that they were gonna have some big numbers.  Could have locked up Trevathan for less than 7 mill last summer.  Malik as well, obviously.  But there's a lot of 20/20 hindsight with that.  Did anyone scream that they should be locking up Malik in August??  
Nonetheless, unless they planning on scoring in free agency every year, got to continue to draft well, and re-sign those guys.  
The Osweiler/Elway thing...........eh.  Whatever.  Maybe Oz shouldn't be such a sensitive boy, and maybe Elway shouldn't act like a scorned ex-wife.  But in general, you expect the 25 year old to be immature.  The old man exec needs to take the high road.  It makes Elway look bad, because they offered 15 mill/year.  You wanted him at 15/year, but now that someone beats it, you didn't want him??  Come on now, Johnny......