I think the Vasari base looks AWESOME, and I love the way it fires. Who can complain about giant purple lightning? And the ripple effect of the firing phase missiles is awesome! Pure gold.
I need to mess with this more, personally, so I don't know for sure, but it seems from other reports that there's a problem with the Advent weapon upgrades working/showing properly. Maybe they look cooler when everything works. 
On a side note, after I reloaded a saved game, once, my Vasari base stopped using it's two weapon upgrades. I saw little purple balls, but no lightning and no missiles
The green glow in the hole a the top had moved to one of the arms, too, but that's just a graphic glitch, while the weapons weren't just invisible, they were gone, because the base took forever to kill the smallest thing.