the simple answer to your question is:
yes, fork the project, include imagick, create your snap…
similar requests have been made in the past and discussed on our github. but our devs have made that decision and we’re doing fine without imagick so far.
but that is not the simple one liner you’re looking for right?
the question that arises is; “what feature are you missing?” maybe we can help with a workaround?
as far as the warning is concerned, there’s nothing we can do about that since its an upstream warning which we cannot change in the snap.