Well, harsh? I think not particularly. I am not really fond of any broken jointed curbe bit, unless it has a "Billy Allen" type joint (the barrel type) that disallows the bit to collapse fully in the middle.
It's kind of like one is trying to mix two different actions and goals , of two different bits (straight curb and normal snaffle) and the horse ends up not benefitting from the mix as much as they might if the rider choose one style or the other and stayed there. I know LOTS and lots of people ride with broken curbs, but I think if you want a broken bit, use a true snaffle. If you want to neck reins, use a true curb or the Billy Allen type.
The real snaffle has no leverage and is designed primarily for direct reining, while the curb has leverage and is best used in neck reining, or supported by a snaffle , as in a double bridle or Pelham.
Do you direct rein or neck rein?