I've been tongue in cheek for most of this, but taking a guard in the first has historically been pretty meh value. For every Quenton Nelson, there are plenty of guys who didn't get a second contract with their team. The plus side is that Guards are cheaper than Tackles, but spending first round capital on a position that only gets marginally better first round performance over players taken later that could've been spent on a more valuable position doesn't make sense, to me.
I do think Zabel is a fantastic OL, though, so maybe they'll get a good one (I hope not lol).
My team also takes the opposite approach of just picking up random guys from bus stops to play guard, so it's not like we're doing any better on that front lol