I'd love to see a 5th edition of D&D that:
1] Went back to basics in terms of races: dwarf, elf, gnomes, halfling and human. 1/2 elves and 1/2 orcs would be available through a feat choice.
2] Went back to basics in terms of classes: cleric, fighter, magic-user and thief. Feat and/or talent trees would allow for differentiation of these classes so that your fighter could be a swashbuckler, ranger, paladin or cavalier.
3] Had 3 core books: The PHB, the DMG and an all-in-one Monster Manual.
4] Didn't rely of DDI for near constant game updates and content patches.
5] Had non-collectible supplements. Wants spell cards?.?.?. here's a deck with every wizard spell in it.
6] Returned the classic elements that were ditched with 4th edition: something like Vancian magic, classic races & classes (see 1+2 above), the full alignment spectrum, the classic Realms, Greyhawk, etc.
At the same time the game would need to run far faster than 3rd or 4th edition (which should be possible if Powers are ditched, and stacking effects, DR, and ability-boosting items are cleaned up). Cut back on the escalation of numerical modifiers in order to make D&D into a game of action, not accounting.
Basically... make 5th edition into a retroclone that employs cleaned up d20 mechanics and some modern design elements that have been shown to improve the game.
