We should have an Universal option, when upgrading dreadnought’s turrets to T4 and T5.
Instead of upgrading 1 turret individually, turrets can now be simultaneously upgraded, at the same time, for the same tier. This option could also be optional, since the costs and time duration would not differ.
In short, instead of upgrading 4x1 T4/T5 Turret, you upgrade Turret 1x4 (universal upgrade, if optional), but the resource cost will still be the same at the end.
If this optional option exist, we can also upgrade 2 or 3 instead of all 4 turrets. Could be handy, if CEO and Vice President is away, since nobody can manage the construction of a dreadnought, than them.
Example: (don’t know exact numbers)
1 x 20000 Iridium for 1 T4/T5 turret and 330 hours construction time
1 x 20000 Iridium for 4 T4/T5 turret/s and 330 hours construction time x 4 = 1320 hours total construction time
2 or 3 x 20000 Iridium for T4/T5 turret/s (if chosen by selection) x 2 or 3 total construction time or just for 1
1 x 20000 Iridium for 4 T4/T5 turret/s, but only (standard 1 turret total construction time), which means all 4 turrets can be constructed in the same time period as 1, if you can afford enough resources