Attempting to Care
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Estimated Time Until Completion : Never.....

Basic tips to reduce lag in large fleet battles:

Escape menu, Display & Graphics tab:
'Effects' section: Uncheck ALL
'Graphic Content Settings' section: Set all to low & uncheck 'Depth effects'

Ship settings:
UNgroup all weapons
autofire set to OFF
Autoreload set to OFF
when activating modules, activate once and wait for it to go green/ammo counter to go down etc.... then deactivate once. Excessive clicking will only cause MORE lag

Overview:
Right click the triangle at top left of overview, select 'Hide all brackets' BEFORE you get to the engagement.