It'll be ... revealing when we see what questions the survey asks. The playtesting surveys I find are of limited usefulness because they grade everything on a simplistic 'good' to 'bad' scale without letting you explain whether 'bad' means a playtest element is overpowered, underpowered, badly worded, or unthematic. It's an incredibly blunt instrument. And the questions they don't ask are just as revealing. The whole massive recent retcon to goblinoids giving them fey ancestry with sleep immunity and floating proficiencies was never put up for survey, for example.
I suspect that elements of the new OGL are just non-negotiable, by decree of our WotC overlords. If the draft OGL comes out and there's dubious elements that don't have any related questions in the survey, it may be because they're trying to slip one past us.
One thing I will say - fill out the survey, but ALSO be vocal on here, on social media, wherever. The survey is a walled garden, and WotC can ignore, curate, or lie about the results however they like. We need to have opinions being heard out in the wild, outside WotCs control.