Without house rules made to nerf it, Hex may be a perfectly viable and really powerful tool within the Warlock’s arsenal.
Just made it to the 11th level and going forward I’ve got 3 spell slots, so now Hex is certainly back within the mix with the Pact Bearer’s rod, I’ll have an additional spell slot once each day. But I got myself a Pact Bearer’s rod so once in a while I can replace a spell slot and use Hex anyway. With only 2 Dnd spells per combat (er, short rest) my blade lock usually has better options than Hex. it is a great spell with good tactical uses. I’ve done a drawback on strength or wisdom ability checks repeatedly making it extremely difficult for an opponent to avoid grapples or detect anything using their Perception ability. A no save disadvantage on a capability check of choice 1st level spell that also does an additional 1d6 damage whenever you hit something is an incredible spell. When you use a spell slot of 5th level or higher, you’ll maintain your concentration on the spell for up to 24 hours. When you cast this spell using a spell slot of the 3rd or 4th level, you’ll maintain your concentration on the spell for up to eight hours. 1.2.5 Q5.Does hex affect concentration?.1.2.4 Q4.Does Hex give a disadvantage on attacks?.