Once @DedeHai gets back from vacation I hope he'll review and approve.

Need to test, may lead to ghost detections

For me it doesn't but shouldn't be a too big issue as you already can get ghost detections on ESP32-Wroom with inappropriate settings.

I tested the change, low values lead to ghost detections but that is probably ok, I did not notice any crashes in my tests (tested on S2).
@RobinMeis your PR is missing changes to the second interrupt attachment here:
https://github.com/Aircoookie/WLED/blob/f6c47ac19cd9fc2b6b2861289b86f2ef963a329a/wled00/set.cpp#L292

apart from that I am ok with removing the 256 as a minimum base value.

I have fixed this. For me, I also get ghost detections for very low values but didn't get any ghost detections within the last two weeks on two lamps with reasonable values.

looks good, gets my approval.