Not really.
In case of a deal you'll probably get some form of recognition from EASA, but in case of no deal you'd likely lose the right to live and work in the EU. So converting to EASA anticipating a no deal scenario doesn't seem a wise choice to me...sure, the UK said it will recognize EASA licences, but you'll then have to convert twice and pay for it.
Renewal of the medical will be funny too I guess...