If we put the pieces of information we have together, then it seems like it is better to wait for the 70D / 7DII, than having it now. Why? It really looks like Canon is planing a bigger step in the sensor design, but it seems they are behind schedule. So especially for the 70D there seem to be two posibilities, the old 18MP or a new 21-24MP sensor. The longer we have to wait, the higher seems the posibility that we get the new sensor (depending on the problems Canon has with the new sensor).
I still have hopes that Canon will introduce the 70D with the new sensor, even though we heard different rumors recently. Why would Canon introduce a new senor in a lower end camera (100D, SL1), and not bring the 70D alongside the 700D, and then bring the SL1 some weeks later. And why didn't they bring the 70D already, since it is overdue after 2 1/2 years, when Canon has all the stuff they need (including sensor) ready. It looks to me (and I hope so), that they are delaying the 70D so they can introduce it with the new sensor.