I have just released an addon that shows some icons on the World Map for jewelcrafters. It's a module for HandyNotes. I realised that Blizzard also put pins at the same locations, which cover icons rendered by HandyNotes. Blizzard's pins are important because they indicate if players can still interact with Shrines and collect gems.
The first thing I thought would search to make custom pins rendered at the latest, after Blizzard. But it is difficult because I don't want to alter HandyNotes addon.
I also thought I could do two other things: change the Blizzard pin's properties e.g. make it transparent (if possible) and add a comment to game tooltip to let a player know Shrines are still ready to interact with. I cannot find out API for those things: both how to change icon and how to get info about profession. Any ideas? Thanks.