Amen to that Del Rio, great post.
Lance Johnstone is the best Pass Rushing lineman we have IMO. That being said I am sure he will fall into a role like Pat Williams. Only instead of stuffing the run he will be rushing the passer.
Sorry to say but Pat Williams isn't going to play every down.
The best thing IMO is by having Johnstone who is a master in technique on the team with these two younger very promising talented ends is he can teach them the ropes.
And by having him rested, he will be even more of a threat. The guy is simply amazing. He has quickness and not just with his feet. His hands and arms execute some very crisp shedding techniques.
There is no way he will sit a whole game. Johnstone is just too good.