Well, I mean clearly, if a trade is done, it's not going to be done within division or to someone you're likely to regularly play...trades in general don't go that way.
The defense does need some scheme help, but this season seems to have shown that - other than a select few - there's also quite alot of personnel issues. It's a defense who's only defensive concern when put together seemingly was to not allow quick scores for a few drives so that Manning could build on whatever lead they currently had.
I'll agree that it seems at least this season, it's more offense based than defense, and it's been for quite some time that either an offense that can score alot or a really good defense can get you to the playoffs. However, you guys have seen for several years that the teams getting through the playoffs and playing in/winning the super bowl have had to have really good to great defenses as well...you guys have actually seen over several years what's happened in the post season when the plan's just been put everything on manning's back and expect *him (or the offense) to (continue) carrying the team through the 2-4 game gauntlet that is the playoffs
...and also, personally,*I don't think you can take this one year - a year when there also was no offseason at all - as a sign of impending major change or the end of any sort of era.