Why is everyone who wants their D&D conservative an old grognard with irrelevant tastes, and therefore a luddite has-been to be scorned? Why can't we please everyone? It's sooooo easy to do, just keep the wacky stuff out of the PHB! Put it in a big old tome like the FRCS or ECS, or big supplemental book, or PHB2. Everyone's happy. Done!
I showed D&D 3E to a 12 year old neighbour yesterday - he just picked up one of the books and went "cool" at the illustrations, I didn't intend to show it to him or sell him on it. Wanted to know how it was played, so I explained that you read this book if you were a player, these if you were running the game. He couldn't see the point of it when computers existed. I agreed. Far too much reading when you could just hop on a machine and all the work was done for you. If I was 12 again I'd share his perspective. What I know of 4E flavour makes me share his perspective, and yeah, some poorly names are enough to stuff it up, IMO. There's a lot of power in a name.
In fact, I think his point of view applies to any age group if D&D is going to put "aesthetic challenges" as hurdles in front of enjoyment of the game. Why bother invest time in a game that you have to fight to be what you want it to be? Heck, M:tG was always a much better payoff in terms of time investment:enjoyment ratio than D&D is.
The one thing D&D has/had going for it over it's direct competitors is the self actualisation and creativity associated with it (even M:tG has a social aspect), and if WOTC is going to stamp their personal specific aesthetic all over the core in preference to something generic S&S fantasy in style because they don't seem to understand a large part of the appeal of their own game is creating your own world and legends, why bother?*

I'm not saying don't design, don't create, just keep the stuff that should be optional, optional...and that which should be generic, generic.
*: That said, I'm cool with the new flavour heavy stuff added to the implied setting, e.g."...empire of tieflings". That's a good idea - inspirational, saves time, guides new players. That should be compatible with not wanting a race called "eladrin" and a class called "warlord" by default in every....single...D&D....game.