Additional Seeking Air Mine for TH 7
I think another seeking air mine is drastically needed for Town Hall 7.
The reasoning behind this comes from clan wars. It is really easy for a TH7 base to be 3 stared against a dragon attack from another TH7 or above.
To balance this out a a second hidden air mine at TH7 would help with this. (This solution would mean moving the second hidden air mine you get at town hall 8 to town hall 7 instead).
I think more than an extra hidden air mine is needed to balance TH7 defense against air attacks, but this is a much needed step in the right direction.