I agree they suck, I had a game where someone was using them and was confused until i realised how I couldn’t see anything was then spamming these things.
I was thinking since they talk about putting stims in the air for workers why they dont make it some sort of Stim grenade thats buffs everyone in its radius but also for a short time after exiting (like maybe 5 seconds with perhaps the grenade improvement upping it to 15) would increase movement speed, attack speed for melee weapons and power. Only issue is lore wise its not really been done.
Outside of that
Would he interesting, have them start off completely frozen but slowly have the enemy start moving in slow motion as the grenades power source runs low before finally returning to regular speed.