In honor mode Haste has much greater utility for casters than martial classes. Martial classes only get one extra attack on top of the two or three they already have. But for casters it means being able to cast two full spells per turn.
A sorcerer or wizard blasting off two chain lightning (if you have Arcane Battery or other means of getting a second level 6 spell slot) is way more OP than a paladin that gets a third attack. Probably still better in other modes where the paladin gets four attacks with Haste.
