This is the most talent-laden draft in a long time, and a record number of juniors have made themselves available. That means that next year's senior class will be substantially less talented. This is especially bad news for a team that will pick towards the end of the 1st (hopefully 32!). I have read that last year, only ~18 guys graded out as 1st round talent, as opposed to 40+ this year. Next year will be down in talent without a doubt.
This means that it is better to have a pick at the top of the 2nd this year (1st round talent available) than the bottom of the 1st next year (likely only 2nd round talent available). Same with the 2nd and 3rd rounds. The guy we would likely get next year in the first will likely grade out around the midle of the 2nd this year - possibly even lower depending on position (although that is true every year).
Now normally I would suggest doing the opposite, and trading up for next yearcould be the right move still if the right team proposes the right trade, but for the most part we should look to mortgage a future pick or two to maximize our return between the two drafts.
For example: say we want to move up ahead of NYJ and Baltimore to grab Lee. We could either give up valuable picks from this draft, where guys will be available who are better than the spot they're available at, or picks from next year's draft, where guys who are available all grade out worse than their spots.