How important is that feature?

I think important, but only the future will tell

How many people are going to use it?

All (unavoidable)

Can you already attain the same result in other ways with your module in its current state even if it is more difficult/complex?

No

Is that just a feature or are you actually improving the correctness of the module?

A very good question. The new feature is actually widening the possible uses of the module. That means that it is backward compatible, but will allow new and more difficult formats when released.

Is your module commonly used on speed critical sections?

Yes

Anyway, the response is obviously 42%.

In that case I am safe :)