Yea sorry that was a pretty empty comment on my part. I'll think of a name today.

Well, I guess we can start a running list of features a wallet that meets the standards support out of the box:
Like you said, CoinJoin, CoinSwap, most of the features of Bitcoin OMG (Coin Control, gmaxwell's privacy enhancement, etc...), extended public keys/HD wallets, and others I don't have time to list right now... will come back later.

Like gmaxwell said, none of these things should be forced on the end user, but should be available at the very least.

Is this mainly to enable network-wide privacy or are we trying to enforce more feature rich wallets in general? or both