Originally Posted by
MaltonNecromancer
No, you can't do it. Being able to Deep Strike and assault would be extremely powerful - Deep Strike is one of those really tricky things to use well, and if you could assault straight from it, it would be on the edge of broken. It would also turn SM Vanguard into an overpriced Assault Squad.
About the only thing I would like to be able to Deep Strike and assault is the Lictor. The fact it can't always makes me think of the guardsmen it's about to eat going:
"FRAK!!! A LICTOR!!!"
"Oh no! Oh, hang on, wait... What's it doing?"
"Seems to be... ineffectually launching it's spiky nipples at us sir."
"Is there some reason we're not shooting at it?"
"Nonewhatsoever sir."
"You men there! The chap with the tentacles: five rounds rapid."
If Lictors could assault when they arrived, they'd be much more in line with the fluff. Still, balanced better the way they are - keeps them more tactical, less "fire-and-forget".