I would like to see Mojang coming with original ideas instead of taking stuff from mods:
1.2 - 2 new biomes (ExtraBiomes)
1.3 - 2 new kinds of dungeons (Better Dungeons), Ender Chest (Enderstorage)
1.4 - 1 new hostile mob (Better Dungeons), 3 new kinds of food (Useful Foods)
1.5 - Hoppers (Buildcraft), Activator Rail and TNT cart (Railcraft), Light Sensor and Comparator (Redpower 2), Redstone Block (swear I saw it somewhere on Ultimate), new ore in the Nether (Nether Ores).
1.6 - New animal mobs (Mo' Creatures).
But then again, I am not amused by Minecraft now, given Jeb's direction. What the hell does that guy thinks he's doing?
Every possibly addition to Minecraft has been done. If you factor in all the popular mods then Jeb and the team would have a hard time finding new things that interest people, and haven't been done. Then if you factor in all the non-popular mods, then there probably is a minuscule amount of things that would even remotely interest anyone that Jeb could add. It's not a new thing that games add what mods add. It just makes it easier for us, the player.