There is a difference between some income and long term strategy. Clone Wars while awesome, does not bring in that much money, it is done on a cheap budget and does not have "that" many viewers. Guess they've been slipping according to the numbers.
THe reason they are trying to get rid of that, and they have canceled the 3D Theatrical Releases upcoming Episode II and III is pretty clear why. They are trying to downplay the prequels, for multiple reasons. It's not as loved as the OT. In Marketing they are going to try to scream "This is a OT sequel!!" Even prior to the PT that started to happen in some senses. Lucas gave people a last year with the OT in 97, then the hype machine started for the PT.
I think Disney is trying to really associate this ST with the OT more so. So I have a feeling (I would be willing to bet it) they are kinda trying to push the PT out of the limelight and bring the OT back into it.
1. People's love for the OT
2. Most importantly it's a direct sequel to the OT and not much to do with the PT at all.
I hope they give TCW one more season. And let them finish awesome on their own terms. I could see them gearing up to re-release the OT (hopefully new SE's that fix some of the complaints) but I think they are going to try to amp up that side to fill in the gap.
To me it's pretty obvious from these two new moves, discarding the 3D Episode II and III (even though they are completed and done TFN reported) and the possible trying to end TCW. I think it's clear what they are doing. But I hope they give a good send off with TCW, because Hunter got me into that. Even though I can't stand the PT and TCW does not make me really like it much better, but TCW on it's own is great stories and great characters. I hope they give it at least season 6 and allow them to complete their story.