3rd edition lite-4e Essentials is not going to work towards a "D&D Edition for all editions". It's been tried before. It might be called Castles & Crusades. Or D&D Essentials. True20. Or whatnot. This is not the market of 2000. This is 2012, and players interested in those play styles have sinced migrated back to their primary games, the question being "if I loved all these bits from AD&D and don't find C&C entirely satisfying for reason X or Y, why don't I just play AD&D itself?" And thus OSRIC, S&W et al. were born.
Castles & Crusades Plus Predeterminded Feats is not going to cut it. Unless of course the whole point is to just go back to 2007 and get some Pathfinder gamers to play WotC's game, which is fine I guess in and of itself, but then don't take me AD&Der for a moron and don't call this the "big tent" or whatever.