So you can have 3 troop layouts saved where after you attack you click on one barracks and can select a layout and it automatically selects all the troops and starts making them with a single push of a button, won't change the cost or time of making troops just save people time in switching between each barrack and selecting troops: Could make it where you have to upgrade your barracks in order to get layouts. Lvl 2 barracks allows one saved troop layout (25gems) lvl 3 barracks allows 2 saved troop layouts (50gems) lvl 4 barracks allows 3 saved troop layouts (100gems). Also if you select a troop layout any troops left over in you army camps get deleted. People would be able to attack faster therefore make more troops, therefore spend more money on COC.
No but instead of having to go back to each barrack to look at what troops you have being made, trying to get them to all finish at the same time, or just what troops to make(weather it's for war, loot raiding, etc). All the tweaks for games like this are for making things easier or faster, it's not being lazy, it's being efficient. I seriously doubt if you boost your collectors or re-arm your traps, you do it one at a time.
It would be quite difficult to do for something that isn't really necessary. For example, if any 1 troop is in the army camps, it screws the whole thing up, also, it only takes about a minute to queue troops anyways