Is Hex worth it at high levels?

[diplomancer]

Whether shifting Hex should require components is a different question of whether it does require components.

It doesn't. Components are only required when you CAST the spell.

A spell’s components are the physical requirements you must meet in order to cast it. Each spell’s description indicates whether it requires verbal (V), somatic (S), or material (M) components. If you can’t provide one or more of a spell’s components, you are unable to cast the spell.

And:

When a character casts a spell, he or she expends a slot of that spell’s level or higher, effectively "filling" a slot with the spell.

You're not spending a slot, because you're not casting the spell. Likewise, you don't need any components either.

Bonus: Hexblade's curse is another feature that curses and that does not require any verbal component.