Okay, so you can take the core classes and then prestige class. No Tome of Battle, no Beguiler, no psionics, no incarnum, no warlock, no DFA... sounds fun and perfectly intended
But that was just one example, there are plenty more! The DMG is the primary source for treasure, so you there's no way to include items from MiC or other sources since they're not on the DMG tables. It's also the primary source for traps, so sources like Dungeonscape and SBG are out. It's also the source for the planes, so whole settings are out
Your reading is certainly interesting, but I'm happy I'll never have to use it.