Yep, keeping perch that are injured and either won't or are unlikely to survive makes good sense. I think nearly everyone does that.

Yes, cormorants have been an issue and still are. They have been culled several times over the years. I haven't seen as many so far this year, not like some years where they seemed to be everywhere in large flocks.

Maybe White Pelicans will become the next emerging issue.
GREAT OUTDOORS: White pelicans could be Lake Erie's next 'cormorant' | Sandusky Register Ohio falls in pelicans' migration routes and are more commonly spotted.