Reflect now seems to always use history. Even when turned off plus you cannot remove the history from it.
After reflect, a new reflect will remove the first reflect relationship. Maybe not a bug but would be nice to have this to create multi axis symmetry.
Filling a hole does not update the reflected side until after a new modification to the subd.
Would be nice if we could see the symmetry plane as a line over the subd.
Would be nice if edits could be made on either side.