Honestly... I think it should be removed completely until fixed. It causes so many problems and bugs... somehow, the shopkeeper from the general store in Rivington ended up in the Carnival area because she apparently followed my elemental (to tell it to shoo). When the carnival left, she was just standing there all alone and I couldn't talk to her, so I just lost access to two merchants.

NPCs dying in Act 2 because they run into darkness to chase your summons, etc.
Also overall it's just not fun - we oftentimes switch from dungeon/wilderness to town/city as part of the regular flow of the game and having to unsummon things that we use spellslots for isn't great. It also unbalances the game because by controlling your summons you can lead NPCs away from merchants so you can pickpocket them with no witnesses

Another issue is druid shapeshift - yeah, we get it, you can't speak as a Bear. Larian, in its wisdom, saw how unfun it is to lose your wildshape as a Druid of the Moon just to have one conversation and they allow you to shift out of animal form just for the conversation and then shift back without spending charges. However this is unfortunately inconsistent. (Act 1 spoiler alert)
Since it has worked so well so far, I walked into the Kagha situation in Bear Form. To my shock I DID NOT transform into my human form for this conversation... so my options to deal with Arabella were (Say nothing), talk to the viper (does nothing) or attack.