Ability to swap out troops when u find a base u want to raid

We should be able to store a certain amount of made troops we can swap b4 raiding a base. I'm tired of finding bases I want to attack but have the wrong troops to attack it effectively. So I have the ability to make almost all of the different troops but I rarely use anything outside of the basic barb, arch, giant,wiz...because they are the most versatile. If we could store like an additional 50 percent of troops somewhere that we can swap out when we find a base we want to attack....more people would make use of different types of troops...popularity would grow and more people will obtain them. Plus...makes the game strategy more challenging and realistic. In real battles they send specific troops that would be the most effective per battle...not the same troops for every battle