Off-topic but : Yeahhh, every threads I see that mentions Witch Boltz would just have people bashing on the spell 😅
So, yes, for future editions, it would be nice the see an improvement on the spell.
In the meantime, why would people pick it? For RP/Flavor reasons. For example, someone focusing on Lightning Damage, but I would maybe then use another "Lightning" spell when available.
Picking it for RP reasons, yeah. Storm themed or Blue Dragon themed Sorcerer or such. I like flavorful Sorcerers rather than "optimized" ones who pick the most mechanically powerful or useful spells. Hence better balance would be preferred from WotC/Larian.
Even when playing a Wizard I like to think the character has some preference towards certain kinds of spells or elements. But it's not a great feeling to use mechanically weak spells with much more powerful options available.
The Witch Bolt SFX and VFX are also satisfying. Just the spell itself.. isn't.