[IXRollOutIX]

Well, I just think physical heavy melee weapons would be more interesting and distinguish Quadro form from the "additional plating" theme of the first form. We don't actually HAVE to give Paleo any overarching weapons. Agito just had form-unique weapons, you know. Thero form could just be quick-rough-and-rumble combat based without any weaponry aside from Spino's arm blades.
As I visualize it, Quadro form should be built like a tank anyway. It would already have enough armor as it is. On top of that, I think the dinosaurs chosen lend themselves to individual armaments super well, too. I'm sort of with Yuu on this.

-Tricera: Spiked Shield.
-Stego: Plated Broadsword (Like this thing, but you know. Not a beam weapon: http://www.scale-mania.it/images/Gun...cale-Mania.jpg)
-Brachio: Jousting Lance.
-Ankylo: Mace/Hammer that creates earthquakes.

Keeping in the same format of Thero form: I have no idea how it would work or how the weapons would be designed in such a way for this to be possible, but maybe for the finisher, they all combine into a single giant weapon and he plows through the monster with it. Perhaps we can come up with a few sketches?