You can disable apps very easily in Lollipop, you can drag any pre-installed app within the app drawer (in the native launcher) to the top of the screen and you will see the "X" so drag it to that and you will see Disable. You can do the same for any app you installed, it will give you the option to uninstall it. You can also go into settings and application manager to disable the 25 or so bloated apps (I killed that many) as well.
Keep in mind removing any app permanently that is part of the ROM can and likely will cause issues when doing an OTA update. So its best to disable rather than remove until we get a factory ROM to restore from.