I hope you got an honest answer, I just asked what's the max res and hz through miniDP, if I get a good answer I might pull the trigger.
Where did you asked this? I asked on Twitter.
This Thunderbolt Station 2 is using Thunderbolt 2 technology, so it support DisplayPort 1.2 by default according to wiki. Whatever your Mac's Thunderbolt 2 port can support, it should support the same res and hz too.