Originally Posted by
Nymrohd
You'd be better in some ways. Elves never had to deal with scarcity in magic power so it would make sense that they would design their spells to be mana hogs because they could afford that. Why spent time to make them more efficient. That would mean that far from the Well of Eternity or the Sunwell, their mages would be much weaker since they'd be able to power far fewer spells. Heck a further effect could be that maybe they'd function like Netheril in the Forgotten Realms; Netheril used mythallar which concentrated magic and allowed them to create much more powerful effects but those effects were localized (and when their magic system was flushed down the toilet and their mythallars exploded they were restrained to much simpler magic). That is, perhaps a lot of elven effort went into creating magical effects that were directly supplied by the Well of Eternity/Sunwell, enabling great civic works and simplifying life. Perhaps elven magisters would use layers of such magic to empower themselves, all such magics would collapse with the destruction of the respective wells and would have to be rebuild.
In short, if their magic is define by the wells, it would make sense that it would develop to be very dependent on them. Keep in mind that the Well of Eternity was massively more powerful than the Sunwell and thus the Highborne likely had access to it even far from it and that while the Sunwell was much weaker and likely its effects were far more local, the Quel'dorei were also insular and not at all expansionist so they likely did not have much concern about their personal power far away from Quel'thalas.
Again, this is just me trying to apply logic to a system that is bound only by the narrative and no internal consistency. The problem is the narrative. If the narrative ever wants to show an elf with insane magic power, it will. Khadgar and Jaina after all have different power levels in different pages of the same book.
Edit: Heck considering how elves react historically to any threat to their wells and their despair for lacking access to them, it makes sense that their arcana is very much tied to them. Illidan could not conceive of not having access to the Well of Eternity and that suggests that the way he knew to use magic required it. When people were cut off from the Well during the War of the Ancients by Xavius, their access to magic in general was much diminished; they had learned to depend on the well for power, not on their personal power.