[Autumn]

I would rather it be an OOC chat more than anything, if there is a concern with wanting to talk to your party members in a fight privately in IC, then whisper/wemote should be changed to not apply battle-wide.

But there is a certain barrier that is torn down when party chat becomes IC (As why would I not be able to hear someone despite standing directly next to them)

I also predict a party chat would assist in relaying information such as letters/notes/event details to 1 person, without necessarily spoiling those details to the rest of the group, it would also make party co-ordination in teamfights not heavily skewed by who discords eachother or not.

And of course, it helps us when trying to gather party members to leave an area.