Upgrade Entire Rows of Walls at Once
It can't be that hard to implement a feature that allows you to upgrade an entire row of walls at one time. It can be done in other 'clash' games that aren't nearly as good as COC so it must be an easy feature to add. It's just extremely time consuming when you get 50 new pieces of wall and you have to upgrade each one individually.
If you highlight a row, it should give you the price to upgrade all of the lowest Level pieces of wall in that string of wall. It'll only give you a price that is affordable as well, so if you only have 1M in Gold and that is is enough to upgrade half of the string of wall then that is what they'll give you as the purchase option.
