Step 1: Implement metamagic incorrectly, allowing two spells per turn.
Step 2: Release an interview where you jokingly complain about how Sorcerers "break the game with metamagic" because they can use two spells per turn.
Larian's gameplay designers, ladies and gentlemen.
As a sorcerer fan, in none of my Early Access games I have abused that. I usually go for a Subtle Spell because it is more thematic (and I hate being silenced). But after they have reconfirmed the feature... well... I might eventually give up and start using it. After all, the rule of every table is: the GM can always houserule things. My guess is that if you can do it, other NPCs can do it, too.
So many things to consider. :P
I guess that might balance their shoving as a bonus action that is one of the more frightening features if your main is not great in neither Athletics, nor Acrobatics.