I don't think we need to go this slow, unless we run into problems...
If we run into problems in f34, we can just revert and try again for
f35. Of course that does assume that it's made easy to switch the
default back.
So, for me personally, I think having a way to test in f33 would be
great and provide more feedback, but I think we should move ahead for
f34 unless there's blockers, in which case we revert back and try for
f35.
What Kevin said reflects my thoughts as well. It's worth trying to aim for f34 and fall back to f35 if it doesn't work well enough.
Kalev