I1. Buffing. It would be nice to have a feature which shows that developers respect our time by giving us an option to buff our party with one click only. Or two for that matter. It simply take too much time to buff party before each fight, especially on higher levels when you have more spells and skills to use. Make an option to choose in advance spells we want to cast on our characters, those spells would be obviously spent and we would have to rest before using them again. Also this feature would work only outside of combat and we would still be given an option to cast those spells "normally" if we wanted to. In Kingmaker mod that provide possibility to buff our party with one click is called BuffBot and unfortunatelly it only gives us one configuration of spells which for me wasn't enough because I didn't want to use my best spells for trash fight etc.
This is actually a great idea and would be an extremely useful feature. I have always hated the idea of needing to buff my party before a battle precisely because of what a tedious chore it is to cast all those spells, and that too in a correct sequence and so on. Only point I would add is to include within such a system the use of items, potions, scrolls, etc. as well - anything that provides a buffing effect on an individual or the party.