If I really didn't like Vancian magic and the strategic and dramatic potential of limited spells per day, I wouldn't have played a spellcaster in the D&D system. I'd have gone to another system.
If I really didn't like alignment having mechanical effects, I wouldn't have played D&D. I'd have gone to another system.
If I felt that I needed to be able to make a significant contribution in every round of combat or every roleplaying situation, I wouldn't have played D&D (which allows for specialists as well as generalists). I'd have gone to another system.
If I thought that "dead levels" were a bad thing, I wouldn't have played D&D (and certainly I wouldn't have played Basic/Expert), I'd have gone to another system.
Given that I've stuck with the D&D system in preference to all others for 20+ years, why would want such a dramatic change to the feel of the game? YES, "other systems" went away from Vancian casting. I CHOSE to play D&D and not those "other systems."
I like the changes to skills and the apparent removal of iterative attacks. A pair of 3E innovations that slow down prep time and game time and could have been done better. And I like the idead of rolling spell DCs rather than saves in some cases (such as with hordes of mooks), though that option was in 3E. I liked 3E's solution for players who don't want to run out of spells -- the warlock class -- but I was really looking forward to playing a low-level wizard in an upcoming campaign. Now I'm not. A wizard with unlimited magic is just not as appealing as one who starts off really weak and has to be strategic and judicious.