IMO Nezh is too strong for the average player, Carl.
Plays beautifully, yes, but too strong to give the average player - even strong player- a chance.
A 2744 liChess blitz rating places Nezh in the range of this guy: https://lichess.org/@/Zhigalko_Sergei - Sergei Zhigalko
European Blitz Champion (2017) and packing a huge 2695 FIDE rating.
I think it'd be cool to limit the nodes per second (if possible) so as to introduce some occasional human-like mistakes, whilst maintaining the great playing style.
Can you do this with Nezh? Or a similar weakening?
Otherwise, you get the "whatever I do, it's hopeless coz I'm playing an engine" feeling.
I've been experimenting with such weakening recently with some success, will create a liChess bot when I have time.
Hopefully, a human-like opponent limited to about 2250-2400 strength on liChess.
So, approximately my level.