As long as the genjutsu in question had a decent stat requirement and cooldown so it isn't abused by 1v1 masteries (GF, agi tai, WM etc) that would be fun, even if admittedly it does sound cool to randomly find yourself in a barren genjutsu staring down someone holding a large scythe.
It would be cool to see jutsu with more utility, or status's outside the status quo. A random suggestion I had for Crescent Moon Beheading Technique was for the jutsu to actually execute the enemy if it was the finisher, as in they can't be revived, the jutsu is still dog tier overall, but it would be interesting to see.
Or bubble's level 30 jutsu putting the user in a bubble, slightly increased movement speed with the added bonus of floating over tags/bear traps etc. (Not an actual suggestion for the jutsu, just a random thought to share regarding jutsu outside the norm...Although it would be nice to actually be able to catch up to people and map lock them lmao, god knows if someone runs from a bubble user they've got no jutsu or options outside of kunais to lock them...Or spit, but you'd really have to stretch for that)