Wells needs to get into playing shape. He's a vet, so his being new to the Rockets system shouldn't add to prolonging his introduction into the regular rotation. If your team can withstand as much as 2 weeks without any or very little production from Wells, it will be worth it, because when he gets back to 25-30 mpg shape he will be very valuable to the Rockets and your squad.
Continue to sit him for now if you have any other option but do not drop him. Even if you miss his first game(s) back, he will most likely only begin with 16 minutes and move up from there.
By December Wells could prove to be one of the most regretted drops in a lot of leagues.