I am a big proponent of using templates to link to external websites like Findagrave. I refer mainly to sites that, like WikiTree itself, have individual profiles. For me, using a template to link to a profile-based website which, in turn, has source documents (for repository sites like FamilySearch and Ancestry), photos, and/or other reliable resources makes perfect sense.
I do not, however, believe that we should use a bot to add transcriptions of the data or information contained on the other sites' profiles. Transcriptions should come only from actual source documents. For a site like Findagrave, we don't know where or even if the information was sourced.
When I link to Findagrave, it is as a resource, not a source (still updating my watchlist to this policy!). I have added the template (using the expanded paramters: sameas=yes) to my personal pre-formatted citation so it will always be included whenever I edit a profile that references Findagrave.
As for what actions we should take specifically regarding Findagrave, I feel we need to wait to see what tact that site takes now that it is under Ancestry's control.
I wonder if they plan eventually to allow Findagrave profiles to be linked to the source documents in their repository. Alternately, will they want to merge the Findagrave profiles to family trees?