Once the surveys have been locked down -- thus releasing your game keys to you, so I've been doing that as the surveys come in -- it won't let you change your planet names.
I think what I'll do is make some sort of data import that has your existing submission on it when we send you further surveys for other creative stuff. Basically if you just have the planet name one, it would be a "last call to make sure this is what you want" sort of thing. For those who have other creative things to put in, we'll work that out either via email (if it's one of the ones that requires a ton of emailing like the art design ones), or via a survey that's collecting all that information.
Honestly I'm pretty disappointed in the way backerkit is so inflexible with only having one survey and only letting you edit it until things like your tier are locked down. I really would prefer a lot more flexibility there, but we have our own survey software that we can use to get around that.
Same with things like the names that other people have already submitted: I can easily dump that to a public list that folks can see, sure.
With all of those things, I'd probably like to wait a month or so, though -- we still have about 1000 surveys that haven't even come in yet, and I'd rather do fewer exports of the data rather than more, just to save time all around.