(Not so) Breaking news: New things take some getting used to.
If you really managed to memorize three separate keyboards (regular, numeric, symbols) and all of the tap/hold options they have, props to you. But, memorizing three keyboards isn't something I've managed to do -- even after using iOS pretty much since the original iPhone first came out. But, I'd personally rather just have it all right there on screen, without having to hunt a key down.