@Rhobar121 what you you mean by a double roll? You mean to use the scroll and then any roll associated with the spell?
I'm fine with that. There are a lot of good spells that don't have an important roll: mirror image, blur, healing word, darkness, bless, jump, magic missile, protection from Evil and Good, Shield, Shield of Faith, Sleep, Heat Metal, misty step, invisibility, spider climb, counterspell, haste, dimension door, greater invisibility. These are just the ones I judged most important from levels 1-4. Also, all the leveled surface spells might have surface effects that do guaranteed damage to enemies, making any attack roll/ST less important.
If you wanted to cast scrolls without making a check, you should have taken a level in a casting class.
I like that the scrolls use the caster's ability score.
Virtually every scroll that requires concentration is much less useful because you lose concentration quickly, even without environmental damage. Which limits the number of meaningful turns quite a lot. As for the list of useful scrolls, I'd say it's much shorter in BG3: Blur, Misty Step, Mirror Image, Healing Word. The rest of them are very niche.
Also, the number of scrolls is very small and anyone who knows how to play would never waste a level to be able to use scrolls for some good but extremely rare spells.
Magic classes don't need them, and that is unlikely to change in the full game. At the moment, the only classes that make use of scrolls are those that cannot use these spells.
If you add the rng component to them, you will make them useless and in most cases it will not make sense to waste turns on them due to the high chance of failure.