I agree with most of what you said, but id like to point out a few things.
I don't have too much invested in Canon at the moment. Sub $800 in glass (70-200, 17-50). So that isn't an issue for me. Secondly, I have owned my T3i for 2 years or so. I know what I like and what I don't like. Obviously, there are pros and cons to both. If I switch over to the GH2, I wont actually be losing any money.
The GH2/3 just provides a better image. Period. Im not gonna BS about reasons that don't matter. When the GH2 is hacked, it can produces images that are similar to something from a C300 or higher end cameras. The camera has to be in the right hands, but personally, being able to achieve that higher end look is worth it to me. Will some people even notice a difference in my edits? Maybe not, but I will.
I recently shot a project for my school's administration. When boosting the ISO to around 1600, the image becomes shit. This is also why I want to make the switch. Both of the Pannys have better low light performance. Next, easy adaptability of lenses make the GH series lovely.
I don't think switching will make my edits much better by any means. But I do think they will be positively effected. I plan on making a summer short film this year. With a hacked GH2, there is stuff that just absolutely cannot come out of a Canon Rebel series.
And last but not least, Im not thinking about making the switch due to "NS Trends". I agree that there are trends, but I have been thinking about this for a while. Hence why I didn't invest much into Canon glass in the first place.
Because I'm from the suburbs, not Compton. And you look like an idiot when you are all thugged out in the parking lot waiting for Mom to pick you up in her Lexus crossover.