What don't you get?
There's no provision for multiple users. This is one of stock Android's strengths - if you want want quickly share your phone with someone else, they can have their own profile, so your stuff remains secure.
This is ideal for kids, where they can (from the lock screen even) access their own area of the device. HTC instead has a Kid Mode, but we much prefer the option for a separate user identity, where an administrator gets full controls.
Android's new battery saver option also isn't a part of the HTC update and we're not surprised: HTC already had a better system and it remains the same as it did before, where you're able to specify what elements battery saver will use to conserve power.
Naturally the dialer is HTC's, as it was before and so is the People app to handle your contacts. Both are reasonable, the only thing we miss is Android's caller ID, where it identifies calls based on it's own databases so you get fewer anonymous callers.