I think the Altar by itself is a great addition, even without potions. It will be an amazing season with so many welcome QoL additions. I’d be happier without the potions honestly.
On the surface potion powers are great in theory, in practice it feels like Flasks from Path of Exile. Instead of using health potions, too you know, heal health:) or Kulle Aid through a wall, its like a wack a mole power button nearly requiring you to use them on CD. Which will not only wear out my mouse key, but the finger pushing it as well 
I just don’t feel a potion should be part of a CD rotation, and using them should stay tactical and purpose specific.
I’m curious how the community feels about spamming potions all season. Do you want to spam potions all season?
Edit: Personally I feel instead of Potion power make it pylon powers you get from clicking a pylon:
Potion AA > Pylon AA Same effect.
Potion AB > Pylon AB Same effect, maybe slight range boost.
With the above, now even the crappy pylons become tactical game play around them.
Potion AC > Pylon AC: Gain random shrine effect.
This would remove conduits so you cant zDPS rifts.