IMO Finley's biggest problem is his immaturity. Each year I've hoped to see him grow up but it never seems to happen. I know he's only 25 years old but this is his fifth year in the NFL. Aaron Rodgers is having his worst season so far since his first as a starter and IMO he's certainly one of the reasons the Packers are currently struggling on offense. Even so, from everything I've read and heard I think its obvious the reason for friction between Rodgers and Finley is Rodgers is detail oriented and Finley isn't. Rodgers forgives physical errors but gets angry when teammates make mental errors. Rodgers spends a ton of time in preparation and expects his teammates to do the same. IMO, albeit as an outsider, all these areas cause conflict between the two because Rodgers is on the right side of each and Finley is on the wrong side. That is revealed in Finley's continuing inconsistency in catching the ball, running routes, and blocking. For example, we've seen Finley block effectively and we've read from time to time that his blocking is improved. Then we see him give a very poor effort blocking. I was listening to a radio discussion yesterday about Finley and one of the hosts mentioned even when Finley had his 3 TD game against the Bears (early last season), he ran the wrong route on each one. I don’t remember hearing/reading that, but the problem with Finley is it's not unbelievable.
Finley's size/speed combination is what makes him unique and it's what is supposed to cause matchup problems. I and others have argued that it's that quality that adds value to Finley even if he's not targeted on a play: The D has to be aware and adjust to his presence. But opposing DCs watch Packers games, too. At some point when the Packers passing O gets back in sync, if you are an opposing DC and worried about (a healthy) Jennings, Nelson, and Cobb don't you think, 'let's single #88 and see if he can beat us'? I would.
Finley isn't going anywhere this season but IMO he desperately needs a "maturity intervention". Failing that or his seeing the light on his own this season (is there a road to Damascus in Green Bay?), I don't think the Packers can afford him next year: He's just too inconsistent.
As to which TE I'd like to see get most of Finley's snaps, IMO DJ Williams is the best route runner/pass catcher, followed by Ryan Taylor. Crabtree is probably the best blocker. But IMO the best prescription for the offense doesn't have anything to do with TEs. It's more Cobb. Lined up in the backfield (but don't hand him the ball, pass it to him in the flat), in the slot and split wide. I'd love to see Cobb get as many snaps as Nelson or Jones.