I was also going to suggest single rider. You won't sit together, but you may at least end up in the same car (won't be guaranteed). You could take your chances showing up before rope drop and if the crowd of people making their way towards TT looks bad to you, just divert to the single rider line.
I'd also question whether Epcot's rope drop procedures will change once Soarin goes down and it's clear most (if not all) people will be making their way towards Test Track. At DHS, everyone makes their way to Toy Story and they do things a little differently at opening. They open the gates around 8:30, and hold everyone at the back of the park until 8:45. They then have CMs walk the massive crowd of people to Toy Story and it's just chaotic. Because of this, it doesn't matter how early you get to the gates because once all the large groups merge into one as they are walking you to the queue, it's very easy to get pushed to the back. I wouldn't be surprised if something like it were implemented at Epcot for crowd control, or whatever reason they do this for.