>> Yes, for example in my package's version 1.7 I plan to use
>> `fontspec-patched.sty’.
> Hang on a sec — how urgent is this? This seems like a fairly drastic
> step; there’s no problem for me to make a fontspec release on
> demand…

I don't consider it a drastic step but rather natural – I use other
packages that need to be patched because the upstream versions have
bugs (longtable[1]) or missing features (ucharclasses[2]) not fixed

> But I’d be happy to perform an update by the end of the week if this
> was convenient for you.

This would be nice indeed :-)  But there is definitely no pressure
from my side.  I now know what to do.


[1] The bug I'm suffering
    is present since more than 14 years, and the patch provided in the
    bug report gives better results (although not perfect).

[2] An updated version should be fixed on its way to CTAN right now.