Changes
I would like to see:
1) A +3 bonus given for certain feats (ie Skill Focus, Spell Focus) as Monte Cook had once spoken about.
2) I would also like to see a defense system set up like Star Wars the RPG Revised, wherein armor reduces the amount of damage done, while you also gain a defensive bonus for class levels making you harder to hit. To me that makes a bit more sense.
3) Make the Paladin less top heavy by spreading the abilities gained through a longer progression. Paladins gain most of their abilities in the first few levels. Afterwards their number of times per day or per week is the only thing that changes.
4) Under certain classes give variations of the class that the player could choose from. For example the Paladin again. Lets
say you don't want a straight Paladin, you instead want to play an Undead Hunter. Instead of taking something like Detect Evil, you can choose Detect Undead...you give up an ability to gain an ability. This would create unique characters. Not all Paladins would be the same. Another example would be Sorcerers. Say you do want to play your character as a descendant of some dragon...you should be able to build them by trading special abilities. Unfortunately with the sorcerer you don't have special abilities besides Summon Familiar, but maybe you give up spell slots instead.
5) Give certain classes some abilities during progression. Give the Sorcerer bonus feats or actually give them feats such as Still Spell, Silent Spell, Quicken Spell at designated levels. Give the Fighter something extra than a limited skill list and bonus feats. This is when alternate packages would really come in handy. Clerics would also benefit from a few bonus feats thrown here
and there, but give them another domain at certain levels.
6) Give Druids domains they can choose from, with gained abilities for their domains. Nature, Plant, Healing, Air, Earth, Fire, Death, Rebirth, Life, etc. are a few suggestions of current domains and domains that could be developed.
These are just a few ideas.