Emissary siege mode visuals
Siege tanks gotta siege.
Emissary now stows its gun between shots so isn't really in siege mode most of the time. Perhaps no longer needed. (On the other hand a proper siege mode has much superior aesthetics compared to flailing the gun around constantly)
It flails its gun because doing so is optimal. If Emissary is going to be reloaded in 6s, but it can shift its gun to forwards and back to where it is aiming in 4s, then it may as well do so and probably even wait for 1s in the forward position (leaving the extra 1s as wiggle room). Then if it happens to need to move halfway through its reload, it will be ready to do so. But it does look pretty silly. I've heard people confused that their Emissary seems to be broken, since it isn't aiming properly, even though it is managing to shoot on cooldown. The mechanic could be improved.