In-game player energy feels significantly different today?

Yesterday I played for 8 hours and got so much done. Today feels significantly more aggressive, On Perimeter anyway. I've been playing for 4 hours and I'm queuing solo with fill on. People seem to want to push every single fight they can regardless of outcome. Ran into a group running purple gear pushing free kit users not even bothering to loot. I have another 2 hours to play but I'm hopping off early because getting anything done is a slog.

Do we know what causes days to feel so different? Has anyone noticed this?