Great OP. Just my sort of thing.
These League Cup threads are always the same: try-hards post lineups featuring the most reserved of the reserves, the youngest kids, the kit man and the tea lady, and then get annoyed when a 'stronger-than-expected' side is put out. And if any player 'dares' to gets tired or injured (because of course there's always someone to blame), the same try-hards will blame the manager for not knowing as much as they do.
It's weird how rotation is seen as a negative by fans but a positive by coaches and managers. "Oh it's only the league cup, we will have to rotate", sneer some fans, strongly focussing on the 'weakening' aspects of rotation.
"Great, it's the league cup, a really good chance to give some squad players game time and help their progress and development outside of the white heat, every-misstep-is-a major-reversal scrutiny of the main two competitons" say our coaches and managers, looking at the positive befefits of it.
There'll be rotation. And that will be a good, positive thing, for the club, it's players and its future. Hopefully we can get through and then aim to get to the final and win a cup that we once loved winning.