While I agree to a certain point with what you're saying and have noted that the O-line needs a rest, I am troubled by our experience in last season's playoff loss after resting our starters in the 49ers game. Not to mention the obvious lethargy and loss of momentum after our recent bye.
It's a pickle. Do we rest Gurley and the O-line to keep them fresh or do we win these last two games with all the starters playing and build momentum heading into the playoffs? This is why McVay and the coaching staff get paid the big bucks. Glad I don't have to make that decision.
$64,000 question (a reference to confuse the millennials out there) - Will playing the guys that seem to be hitting a bit of a wall get us a better result than last year? I'm not so sure that resting the players is what got us that result. Two muffed returns, Goff being off (like he has 2 of the last 3 games), and a D that when they did stop the run made a stupid penalty, IMO, had way more to do with the loss than any sort of lethargy from the lay off.
Right now, we're not playing all that well but still had opportunities to win the last two against the best team in the North and last year's SB champs.
Even if I wanted to, I can't make that decision for McVay. And yeah.... I'm glad I don't have to because I have literally no idea what the individuals on the team or the coaches are going through right now. Are the players worn down? Are McVay and Wade holding back some wrinkles? Did teams figure out our scheme or how to defend us? Did we lock things up and decide to go all in on the playoffs figuring that home field on that gawd awful turf is really no advantage?
Personally though, I would like to see them limit Gurley's playing time if they play him at all. I would like to see them rest Whit and Sully. I frankly DON'T want to see them rest any of the D. Aside from a few crappy plays, it seems that the D is starting to gel and could use these last two games to eliminate the blown plays as they really seemed to be mostly a matter of missed communication or poor positioning rather than fatigue.