It's really only being used to move armies to new regions that you want to conquer. No one really uses it to grow his army on a daily basis.
(sure, I could have merged more if I was golding, but that's just a waste of money).
but you can do it, that´s the whole problem.
and you are talking about moving armies to new regions. plural.
so you can gather armies from multiple villages and move them all to one big army which is the same result as doing it on daily basis and not teleporting the whole thing
but I am really glad, we can all agree that there should at least be some limitation to this gold feature