Any point to assassinating captains?

[Jikot]

This is something I've been wondering, is there any point to assassinating captains?
Beside the trait increases for your assassin.

As far as I can tell, no units disappear when you successfully assassinate a captain. Not even single soldiers.

[Titus Marcellus Scato]

Just experience for your assassin, nothing more.

[Ludens]

If the old games are anything to go by, assassinating the captain should cause a morale penalty. I am not sure if this was implemented in M2:TW, though.

[joshmahurin]

It definitely should be though. I'd definitely desert if my captains kept dying of mysterious causes...

[Arjos]

Or get a promotion that would not last long :P

[Skullheadhq]

Or get a promotion that would not last long :P

That's not a good thing if it means your throat will be slit by assassins.

[QuintusSertorius]

Just experience for your assassin, nothing more.

Yep, this.