In the same boat with a 15" 2011 MBP (i7 2.4, 16GB, 750GB 5,400rpm) and waiting for the refresh. My trackpad doesn't register clicks anymore (tap works just fine, though, and my muscle memory has completely adapted to the change) and it only charges if you point the magsafe adapter the wrong, port-coverging way... but I wouldn't say it's running on fumes.
I use this to edit HD video in FCP X as well as do motion graphics and sound production in Motion and Logic Pro X and it still gets the job done fine enough. Here's an example of something I just made with my 2011 MBP 15.
I know even the current MBP would show me a huge increase in speed and responsiveness when it comes to working with these apps, but it doesn't change the fact that my current MBP still works.
What are you doing with yours that is making you feel like it's struggling so much?
If the new design comes with a dGPU I think you'll find a new best bud.
By the way, I checked out your video! It's cool. (don't wanna bash you, but you misspelled coffee at 0:44...)