Barrack use improvement

Sometimes I attack often where I use the same army composition over and over.
I always need to scroll between all the barracks to put an equal number of units in training.

I would like to propose the following idea.

Now we have a training window for each barrack available. Instead, there will only be one.
In this window, you will have the exact same interface as before (with a small change, I will write down later).

The training times are reduced by the number of barracks available.
If we train 4 giants but out of 4 barracks only 3 can train gaints, training times are not 30 seconds, but 40 seconds.

If we have 4 barracks training a barbarian, then after 20 seconds we have 4 barbarians.
Since we will have only 1 window for all barracks. The training times are reduced by the number of barracks available.
So at TH8 we have 4. So it takes 5 seconds to train 1 barbarian. Over 20 seconds we have 4 barbarians.

The order of training units is in the exact order as we train units. If we click a barbarian, archer and barbarian, then it should not merge into 2 barbarians and 1 archer.

To change the order, you can swipe the tiles. If you have 10 barbarians, 10 archers and 10 barbarians in training, you can swipe the 3th tile (barbarian) infront of the archers. Then the barbarians are merged to one tile and you will have 20 barbarians and 10 archers in training.

[10 barbarians], [10 archers], [10 barbarians] -> , [10 archers],[10 barbarians], [10 barbarians] becomes
[10 archers], [20 barbarians]