Possible buff on a Siege Creep (Catapult)

I was wondering, and I came up with a slight buff to mentioned in the title Siege Creeps that can be quite interesting.

What if Siege Creeps had a passive ability to do a Mini-Stun with 15% chance on the True Random Distribution? That would work only on heroes.

I saw many times heroes trying to escape a gank and when they succesfully outjuked enemies, they are often near a lane path with creeps and they are escaping with Town Portal Scroll. What if that Siege Creep had 15% chance to stop that TP? It would add another factor to the game that can make watching games more entertaininig and less predictable. Players should also bare that in mind and it could make something like "Million Dollar Siege Creep Stun" that could be game-changing.

What are your thoughts about it? How it would change laning stage and fights? Imagine Siege Creep interrupting Black Hole or Fiend's Grip. Is it too OP, or unsignificant? It adds unnecessary randomness to the game or it makes it more complex in a positive way?

Maybe you have some suggestions how to change that? Alternatives.

I'm not sure. Although it could be a good idea as siege creeps don't spawn every wave it could screw up a lot of things. Crystal Maidens ultimate is really powerful but is channelled. If you manage to set it up properly only to have a siege creep stun you and mess up the teamfight could be annoying. On the other hand it could be a good idea. I can't really know for sure, but It would certainly make them more of a threat.

Maybe increase the range to 710, so it can attack towers without being attacked? (now it's 690)

I prefer the stun idea. If you increase the range then it becomes way easier to take out towers.

But there are enemy creeps. And you have the enemy's siege creep

The way I see it, range is so commonplace. If you give siege creeps something unique, like a stun chance, it adds a whole level to the game.

Maybe a slow?

How is a catapult stopping a 5 man Black Hole entertaning? I don't agree. Juking is based on the player's skill, a good juke will often get a player out of bad situations. I don't want no freaking siege creep stun me while I juke then my enemy going like :

"XAXAXAXA HUEHUEHUEHUE RNG in my favor cause catapult stunned you"

As Sofa suggested, perhaps a slow then?

i see no use in adding useless annoying randomness.