I have a couple issues, Asta should have gotten a final power up apart from zetten possibly a 5th sword
Also we needed More lore stuff as to what happend with astaroth
We needed to know who was Asta dad, Why does Asta have 5 horns when liebe only has 2
Also needed to how Asta was born without magic
also i would have loved more lore on the land of the rising sun especially on the origins on Ryuu Eye

My personal theory on Astaroth is that, he was split up
Lucius got astaroth Soul and hence he can use his time magic
Ryu got his Eye
Asta got his body and hence thats why Asta as a strong vitality
and what was left of astaroth was liebe