Mustipher, Bars and Ifedi are all older than Daniels. 2 of them wouldn't have seen the field if Daniels didn't get hurt, so I don't know how you can say they give you what he does. Borom hasn't played a snap yet, and probably won't for a long time. I'm not trying to argue that Daniels has distinguished himself here, but his competition is a 5th round rookie, a UDFA undersized C with 5 games of decent play, a UDFA with maybe 2 games of decent play if you squint and add all his partial games together, and a failed 1st round pick with a handful of decent play at RG that would also require 5-10M (since he's getting 4.5 this year) to re-sign this offseason.
If your reasoning is that Daniels isn't good enough, you at least have to admit he has the most upside of those other guys you named because he's younger than all but 1 and was more highly regarded coming out in his draft class than all but Ifedi, who already failed harder than Daniels has.
If your reasoning is that Daniels is going to get too expensive if he performs well, then what's the downside? Isn't good guard play ideal? Good guard play in 2021 + a comp pick is better than a downgrade at guard and a below average 2nd TE also for a year.
It doesn't change the fact that Mustipher played better at center than Daniels and Ifedi graded out similarly while facing tougher overall competition. They give me what he does because Daniels is an average to below average G/C. I don't know how else to say it. He is average to below average. A UDFA performed better than he did at C. It is funny you say Mustipher, Whitehair and Bars are undersized when they are the same size as Daniels at around 305 pounds. I like Borom precisely because he is over 320 pounds and an actual mauler which is what I think we need at RG. Daniels isn't replacing Whitehair at G or C and is smallish for RG so his only shot is beating out Mustipher.
My argument is simple. Hurst does Graham's job for cheaper and stretches the field in a way Kmet and Graham cant. Daniels is a G/C that is basically interchangeable with the other G/C prospects we have particularly when it looks like the Bears want to go bigger at G and he was outplayed at C by an UDFA who is the same size as him.
Whatever potential he has left, I simply do not think is worth it as I doubt he ever reaches it. It really shouldn't take this long for a high draft pick at G to distinguish himself as G is one of the easier positions to transition to in the NFL.
It is fine if you disagree and you hold out more hope for him than I do.