[Suggestion] Give Advanced buildings the ability to produce while upgrading
Watchtowers always produce, even while upgrading. But there are no Advanced Watchtower.
With regular mines, and farms, when you upgrade a Stronghold you can upgrade all 4 mines +1 level and all 9 farms +1 level spreading out the loss of production and keeping your builders busy.
But there are a limited amount of Advanced mines, and Advanced farms, in the game so you are forced to keep upgrading 1 Advanced mine, or 1 Advanced farm. This causes huge chunks of lost productivity.
With Advanced House, we already see a building with a new meta game.
To compensate for lack of Advanced Watchtower and simply leveling regular mines, and farms, to level 25, give all Advanced Buildings the ability to produce while upgrading.
Unlike regular mines, Advanced mines would produce iron while upgrading.
This would actually encourage leveling at least 1 regular farm, and 1 regular mine, to Level 20 to take advantage of Advanced buildings ability to be used while upgrading.
Lodge and Barracks
While upgrading 1 of 4 Forges, you can use the other 3 to produce Battle items.
With Stronghold 21, to 25, Harpoons, Titanium shield, Panacea, 4* / 5* hero class nodes, there is already an iron bottle neck and resource juggling.
Just like Watchtower can still revenge while under construction, and Forges can produce Battle items while 1/4 are upgrading, allow Advanced buildings Lodge and Barracks to keep working while under construction.
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