Let me preface a poll with a quotation from the Player Handbook:
lists the highest level of spells that can be cast by a wizard with this
Note that it specifies cast instead of scribed. This means that the current implementation (intelligence required to scribe) is not more faithful to P&P than the old implementation (no intelligence requirement for specific spell levels).
I strongly feel that the current implementation is half-baked. As it stands, the requirement is only a minor annoyance; it sucks if you find a cool new level 9 spell scroll at level 18 and do not have a potion of genius with you.
Since they are easy to find and cheap to purchase, the requirement does not add anything meaningful to the game. It only serves as a "gotcha" for people not familiar with the rule and ways of how to temporarily increase your intelligence. The implementation is also inconsistent as it does not affect High Level Abilities (level 10 spells).
That is why I would like to the game either to revert this change or extend it to casting spells like in P&P. Personally I would prefer a revert, since otherwise the most powerful arcane caster (Edwin) become relatively even more powerful. I could still life with the P&P option, as this would make the restriction meaningful instead of an annoyance.
As a closing note, there was a broken implementation of the rule in the original BG 2. That is why for example @Dee
sees this as a bugfix instead of a change. Personally, I wonder if it was left broken on purpose. Maybe the devs back then decided that implementing it would not improve the game? After all it did not even matter for BG 2 pre ToB, since you just need 16 int for level 8 spells (maximum at that time).