There is an initiative factor involved in D:OS2. It will have to be tweaked to follow the rules of D&D 5E. As I said Larian could not copy the D&D 5E combat system in their game, so it had to be a little different. To fix it they would have to take out the round robin aspect and follow initiative order by the number rolled for both allies and enemies.
Initiative in D:OS2 is actually an attribute.
https://divinityoriginalsin2.wiki.fextralife.com/InitiativeYour own source here clearly says initiative in D:OS2 has no impact on combat and is essentially a useless attribute. D:OS2 is strictly round robin, and the character's actions are entirely completed within that character's turn. Characters cannot act simultaneously ever. Actions cannot be held over, and actions do not carry over to subsequent turns to complete.
Oh, and in D&D 5e spells do have casting time. Some spells only take your action or bonus action, but others do take minutes of time to cast.
The D&D 5e and D:OS2 combat systems are completely different systems. Since this is supposed to be a D&D game and NOT a goddamn D:OS game, one would expect it will use the D&D system and not the D:OS system.
