So, to summarize the actual benefit in D8 sides:
AAA is more acceptable at this lower D1 vs up to 3 planes.
Is it enough to let them fire each round?
Because OOB at C5, it was not that popular purchase.
An increase gap between off/def Infantry A1-2 vs D3
Artillery A3 D3 on offence is better than Inf A1-2 D3
Tank A4 D4 is not different but better in offense compared to Inf A1-2
However, the gap between Tank D4 vs Artillery or Inf D3 is only 12.5%, OOB 16,7%.
And there is a 2 IPCs difference, usual ratio 11:9 (1.22),
11 D2 C4 (44 IPCs) = 9 D3 C6 (54 IPCs), but now 11:10 (1.10).
I see an issue here. OOB Tank was somehow correct as defense.
If, Tank A5 D5 (62.5% vs 37.5%), then ratio becomes near: 12:10 (1.18)
But now Infantry, MI and Artillery clearly too strong for the cost.
I might be tempted to increase Tank attack and defense factor to 5 (same as Cruiser A5 D5).
So it can keep its niche. I suggested to get ride of bonus to TcB to compensate.
Or revised the Blitzkrieg bonus to TcB to compensate for Tank weakness.
Rising Cruiser and Battleship attack and defense compared to OOB while choosing the lower value
Fg A4 D5, TcB A4-5 D4 StB A5 D2 instead of higher D6 or A6, might help reduce the Aircraft dominance: Dark Sky and al.
It would solve the BB and Cruiser issue.
Cruiser may be better than Battleship, as a cheaper unit is more cost effective.
But, it is not clear, probably near even in combat for same IPC basis.