>>282066533
>>282081450
>>282084322
Rare are the author who would admit "sorry my show is lacking episodes". Unless it's obvious like NGE.
Just the marketing impact would be disastrous so there's probably a line in their contract about "never criticizing the show"
Professionally they just can't.

But it is obvious that Vision of Escaflowne had enough content for an extra story arc or two.