I mentioned this awhile back on a twitch stream and you thought it was a good idea but haven't heard anything so...

Please add someway for the player to annotate the map (flags/stars..) or save locations.   It is so very frustrating when you know your scout has found a key item location (hero, quest item..) many  turns back and now your ready to go for it but cannot find it again on the map.  And even if you remember the general area the structure can be very hard to spot.  E.G. the burning embers quest spot (where fight to get it) on the map is just a small pointed spire.  

Many times my scout finds hero locations but my army is no ware ready or close to go retrieve him. It becomes a very frustrating experience scrolling around the map searching and searching and searching.. 

it doesn't need to be anything fancy (although fancy is good) and even if it were limited to flagging 2 or spots, it would take the tedium and pain out of re-finding an important item on the map.  

Maybe it could even be a non-player initiated indicator, like changing the tile/icon to indicate (color,flashing, star..) whenever a KEY item (hero, quest item) is found.