I think before you decide if Wade is going to finish the season or be replaced, and if it is the latter, in what manner, you need to answer the Cowboy's most pressing questions:
1. What is the actual GOAL / OBJECTIVE for the rest of the season
2. What is going to best serve the Cowboys going into NEXT season and beyond.
The two questions would seem to be one and the same, but if the goal for the franchise is to "save face" and eek out a couple wins, that might not be in line with preparing for next year.
If indeed the Cowboys are looking to the future, you have half a season to determine who are your players for next year. For example, how much longer does Kitna stay in? We all know what Kitna is, isnt it time to see how the kid can play. Get him not one or two, but 5+ games of experience to grow and show his stuff?
The same question can essentially be asked down the line - I am not that familar with the Cowboys roster outside of the fantasy positions, but I am sure there are guys that may or may not make it onto next years team. What better time to throw youth into the fire to see what you have?