If I were to give up two 1st + 2nd I would want it to be a sure thing, not a boom or bust...
While I would generally agree with you, what exactly would we be risking?
I mean, if Jerry fired Garrett and stepped back and admitted he needed to change and put in a real coach and a GM or whatever, then I'd be right there with you. But we all know that Jerry isn't going anywhere and neither is this ridiculous, bullshit structure that isn't going to allow us to win anything of note anytime soon.
So would we really be mortgaging our "future" if we were to give up all that and miss on Manziel? The way I look at it, we're headed for doom anyway so we have nothing to lose. But if he becomes a star, a franchise QB can do a lot for you even in a circus like Dallas.