I don't think you have to do both well. I'd rather have a few really good position coaches and a few talented recruiters for balance.
The OL was bad this year overall. Even in the good years ND OL's have struggled to dominate quality defenses (non MAC level) and they struggle with 3rd & 2 / 4th & 1, which is about the only sign you need to know if you have a good line or not. The early to mid 90's lines were WAAAAAAY better.