Are you nuts?
RG3, the guy who scorched us as a rookie, will be completely healed. Jordan Reed, who came out of nowhere will be completely healed. Garcon, who was the focus for secondaries, won't be tied up as much. There's still Alfred Morris to consider. Now there's Jackson and Roberts to worry about.
Their offense, on paper, is now vastly superior to the garbage they fielded in 2013.
Their defense will still be a joke, how much of a joke will depend on their draft selections and whether the rumors about Shanahan handicapping his defensive coordinator is true.
The only wildcard in this scenario is their new head coach. If he's awful, all of this is for naught. I can't imagine him being terrible, however, since his brother has probably been helping him make the transition during the offseason.