New findings-
If the remote needs a firmware update, it's necessary to hold the Power Off button until the screen goes black and the Harmony name shows again, before updating. If this isn't done, the update won't go well, if at all.
Harmony offers a remote called Companion, which comes with a hub of its own, but they also sell this as a separate item, without the hub. This would be a great thing when someone has kids who drop things and it gives them somewhat limited control- the Elite allows updating, changing certain settings and editing from the touch screen, but the Companion doesn't. It does, however, have the Smart Home buttons for lights and outlets and its surface is more grippy, so it's extremely easy to handle. It doesn't have back-lighting and its battery is a flat disc- CR-2032- this is a very common and inexpensive battery.
The reason I mention the Companion at all is because it can be paired to the same hub that comes with the Elite, without affecting the operation of the rest of the remote system. It only has three Activity buttons, but they perform two functions- one Activity uses a short press and the other uses a long press. Also, the function for these buttons can be changed easily in the same software and changes to either the Elite or Companion don't change the other. In addition, it appears that at least one additional hub can be paired to the system, in case more equipment needs to be controlled- still need to get more info about this.
Battery life for the Elite- so far, it's more than a couple of days with heavy use. Obviously, if the touch screen and haptic feedback are at their upper limits, it decreases and I have mine set for buzz and vibrate, with the back-lighting at the highest setting. The great thing about having the Companion is that I can control the system when the Elite is charging, they all know the state of the system when the battery has been depleted and charged, so it doesn't go back to a "Power Off" state and if necessary, the iPhone/iPad app still exists as another option. I use that because I need to be familiar with it, but I prefer using the remotes with hard buttons because I can feel my way around without having to take my eyes off of the TV.