That's why I'm prob selling the 70D as soon as I get my hands on a GH4. Have had Canon's since my manual F1 in 1981 (aside from having to use Nikon F4's shooting for an org in the 90's), but truthfully, Canon's a bit behind now with video and with what the Pana can do (according to sources anyway) with vid, I'll jump on that one as soon as I can. ML won't be out for the 70D before the Pana arrives, that's a fact. I miss many things that I had with ML and the T3i/T4i, but as all things go, keeping up with the times and DSLR vid (incl 4k and raw) is where things are now. Not waiting till the 70D is obsolete for RAW vid to be available. Canon could have done that. They didn't. Others are heading there, I'll follow.
I don't think Canon will ever develop RAW video for lower cost DSLRs. The truth is Canon markets their product line in such a way for consumers to have a reason to purchase their more expensive products. Canon, as with any manufacture, will compete only enough as they need to; always trying to appear just ahead of other competitors, but saving some newer tech out for next years, more advanced better-than-ever-before model. The good folks here at ML have created a monster of sorts by opening our eyes to something better.
The Panasonic GH4 looks great but I'm not seeing RAW video support. Are you sure it does RAW video? As for myself, I did consider the GH3(?) before seeing what the 70d could do. I consider myself photo first, then video as a plus. I have over the years invested in several EF lenses so that makes switching brands harder, too. Best of luck to you!