You can take the title and can replace “Treasure Maps” with every other collectable ressource.
There is a time, where you have a overstock of everything. There are even times, where you will have all troops (+mythic-ascension). So would you complain about the keys you would receive on daily tasks?
Yes, treasure maps are useless after some time and probably the collectable, which turn out as useless as fastest.
But a easy solution would be, to make treasure hunts more valueable, so players can get rid of the maps with playing
But it’s simply just the start of the chain, which makes it a bit obsolete to want any changes there.