The elder races can be quite single-minded at times. The choice of targets makes perfect sense. I only hope that when the League presidency passes on the League fleet is not thrown away.
It was Impossible Hatching that was foolishly destroyed I think.
The War in Heaven is so big that planetkiller superweapons are reduced to literal footnotes.The Juvans did have one other 'ship'. The Reaper-class Last Breath was a 'Colossus' - an unfathomably large spaceborne weapon mobile weapon platform. Last Breath did not see action against the League, perhaps out of overconfidence, but her 'world cracker' weapon did destroy the Hythean colony of Maggrim in August 2450. Civilians and politicians everywhere were stunned but military officers in the Non-Aligned navies and armies regarded such weapons as misguided strategically as well as morally - immense resources that could have gone into a much more flexible fleet of battleships or grand army that could conquer a planet rather than reduce it to a useless cinder.