> Interesting that there's no discussion of the correct ethical response, which would be to agree to the request. The change is yet to be formally released, so agreeing doesn't harm others by removing a feature they were relying upon.
That's not true: the ODT exporter was released a long time ago and is part of the Org mode that's distributed with emacs. What happened now was a rewrite of the low-level parsing code, and a rewrite of the export engine. That required the exporters (including the ODT exporter) to be rewritten if they wanted to take advantage of the new export engine. It's this version of the ODT exporter (and the rewritten HTML exporter) that is at issue.
It's conceivable that somebody could still use the old ODT exporter, but that is no longer maintained and would bit rot quite fast (if it has not done so already.)