Another reason indoor attractions are superior is the Florida heat and humidity. You can always hit rides with long outdoor queues early in the morning or in the evening, but the heat and humidity get to people eventually, which is probably why half the guests go home before evening.
Do we know how much if the queue will be indoors? A new, popular ride with a long, hot queue could result in a lot of disgruntlement among the guests.
Universal did a great job adding more shaded spaces, an indoor Ollivanders queue, Knockturn Alley, and interactive wand locations involving water misting or jets of water in Diagon Alley, which makes it a far more enjoyable land than Hogsmeade imo. They need to do something similar with this ride in order to balance things out for Potter fans.
An overly long and hot queue or a ride that shuts down every time it sprinkles could affect the enjoyment of and popularity of this ride, so I don't see why climate considerations are any less a legitimate point to discuss than ride mechanics are.