@ASASG, it’s a great idea. plain and simple.
We have completed housesits in US, Canada, UK and various European countries.
Have raised this idea with THS on Forum at least once. To my knowledge, product update has been raised extensively. Illustrative weblinks below.
To my knowledge, and delighted to be advised otherwise, THS has no active plans to execute this product update.
Perhaps THS Forum members could rally around a single related product update and each “vote” in efforts to escalate (as appropriate to #votes) request.
Personally I don’t even think definition is that important. Schengen area, Eurozone, EU Customs, etc all are defined (though Schengen likely easiest). Importantly, given UK Brexit vote, UK is not part of most definitions of Europe.
Workaround is to select individual countries. Or use draw manual map in search function. We use two searches (West Europe and North/East Europe) to effectively capture geography of continental Europe.