It might be broken if it weren't for the fact that you can use it once for a short rest, after which it requires both hitting the enemy and the fact that the enemy will fail the condition check with which most of the stronger enemies will have no problems.
How is this different from the need to remember what color spray or maybe entangle does?
It's not different, it's one more thing to learn and remember.
This is a mechanic that fixes what 5e broke, which means that the weapons are really different from each other and not just have different damage.
You don't need new conditions at all to achieve this.
- An attack to charge
- An attack that makes AOE damages
- An attack that inflict the prone condition
- An attack that inflict the blind condition
- An attack that inflict the stunned condition
- An attack that reduce the ennemy speed by 2
- An attack that gives advantage to an ally engaged with the same ennemy during 1 turn
- And so on....
