Grossman lost his mobility to dings and was clearly the better QB while Kyle was sitting. Kyle finally got his act together and became the better option. Neither were Franchise players so never understood the continued butt hurt over it.
AS for Mitch, his ball looks better and the deep ones are finally turning over but you can't fix stupid. A few plays before that he lost 2 yards and took a sack running OB without flipping the ball forward for no gain like any competent NFL QB will do after a year or 2. I give QBs with potential until early year 3 to overcome their issues. This is year 6.
Watch the 1st 30 sec. of this and you'll see him take that sack and another with over 3 sec before going down. There was an easy escape lane to his left. All the physical ability in the world but visionless/braneless.
He's a fine stand in for a year if needed but he's not a destination.