It was too much work. Few people had the patience for it as leveling took much longer back then. Though, putting it in the back of the book likely didn't help either.
It looks like they're bringing back all the suck to D&D5. They aren't just doing this on the players side, but for DMs too, so the more I hear about it, the less interested I get.
I took the quiz some time ago actually and scored:
Tactician 58%
Butt kicker 50%
Storyteller 50%
Method actor 42%
Specialist 42%
Casual 33%
Powergamer 17%
Psionics has been a part of D&D practically from the very beginning. Seeing as you have never had to use it, I don't understand what you're complaining about.
I like how skills are handled in 4e. You no longer have to worry about the Pc's not having the appropriate skill for the encounter.
Skill based systems tend to annoy me now.
Honestly, I don't care about what will be the "official" method for dealing with xp. I'm just going to have all the players level up at the same time when it feels like it's time for it to happen. Likely every or every other month.