Can we please either have Brooch of the Tempest work against waves moving you around in the Seas, or have an artifact of similar value created for such a purpose?

Yea.

If Brooch would be changed or added another artifact. I bet many would buy him
right after it appear.

And make Aquamancers immune to the currents. I still don't get why not only am I a merian, but an Aquamancer, and the currents still completely disorient me as much as a soggy Tae'dae who can't swim.

Think I suggested this upgrade to brooch somewhere, must have gotten buried/ignored. For 150cr, it should stop you being moved by waves too.