Davis will I think be a very good back behind the zone blocking scheme once the offensive line actually gets good at using it. At times during the preseason and in the first couple of weeks the line opened some nice holes and Davis made very good reads resulting in good yardage. Unfortunately the fumbles early in the year made those runs a non-factor. The run blocking has been off and on all season as you would expect from an offensive line that's changed the way it goes about it's business.
Give them some more time to get comfortable in this scheme and we'll start to see some more production out of Davis (and Wells/Hollings too I'd bet). The linemen are incorporating two new starters, one player who's moved inside, AND a new run blocking scheme. At the same time the running backs are also learning to run behind the zone blocking. By the 10th-12th week we're going to be running on people much better than we are right now.
Davis strengths are perfect for this if you think about it. Davis has good vision and one of his strengths has always been a good knack for knowing when to cut it back. He isn't a speedster but he's always popped through the hole when he hits it as quick as anyone could ask for.
This is just going to be the slowest part of our offense to come around because this is where the changes took place this year on offense. Give it time.
And gwallia is correct. The Jags can stop the run. We should all be grateful that our passing game and defense can carry us when that happens because it won't be the last time this year our running game struggles.
A wise man once said "The ball just didnt bounce our way this game and yet we still only lost by 13." - EllisUnit