It is kind of annoying when you have to make those kinds of adjustments though. Like, the authors never saw any possible issues with spells or abilities? "Oh so the wizard can make a few magical ice clones, what's the worst thing that could happen?".
Earlier today at my game, we used a scroll of magic circle to completely trivialize an encounter with a powerful undead by casting it just outside a room we knew the creature was in and then opening the door and lobbing ranged attacks at it.
The DM admitted that he could have had it come out and attack us to disrupt the ritual (even though the adventure says it waits inside to attack the first person who comes within range) or by changing the layout of the room to give it some cover, but he'd thought the encounter as was would kill at least two of us, so didn't want to foil our creative solution and use of resources, but it still got me thinking "this seems like a spell that could be abused".
Sure it costs 100 gp and takes 10 minutes to cast, and maybe that was just the perfect place to use the spell, I dunno. It feels off somehow.