I don't think it's even close at this point IMO.
After watching both the Gophers and the Sioux on television quite a bit this year, Gleason has outplayed both Ness and their super-frosh Leddy.
That's what makes it hard to take Gleason out of the lineup...he's just playing too well to have him sit.
And honestly I'm pleasantly surprised. Entering the season, I thought Gleason would be battling for that 6th spot, but right now he's looking to be a GREAT dman for the Sioux in the future.