Oh William.
Whitner has done a pretty decent job out of the gate. He should be commended on that. As to your argument, I think we can look @ the Raiders and see that drafting OL high doesn't guarantee tons of wins, either. I'm just hoping Marv and company will concern themselves w/ drafting the best PLAYERS for this team, regardless of position. We got a starting DT out of this draft, just not where people wanted to: we got him in the 5th round. As for the OL, I posted yesterday about how I feel they're much better in run blocking but still need work (interior especially) in pass protection. They're a work in progress, but it's pretty decent progress so far.
It's still too early to tell for sure, so we'll see what happens down the line. So far though, I like the defensive players we were able to acquire in this draft.