Leangle actually seemed to get stronger after the Spider Undead was sealed the second time, even though he didn't get a stronger form. Why? The Catagory Ace had an influence on him because it wasn't sealed correctly the first time, after being sealed correctly, the system could fully use his powers.
There's a couple situations that seem to be deliberately ironic reversals of things seen last year. In Faiz, the Riders were the doing of the original, good leader of the evil organization. In Blade, the Riders were the doing of the original, evil leader of the good organization. Also, in Faiz,Poor Communication Kills was taken Beyond the Impossible. In Blade, the Monster of the Week impersonating Riders to sow discord is resolved very quickly by the characters checking with each other and assuming the obvious. In Faiz, such would have kept everyone hating each other for ten episodes, surely. Don't know whether the nod is affection or Take That, in the case of that last.