Personally, I have quite a few regarding various aspects of gameplay. First up, Lorewise:

For the empire to fully exhibit a visual show of imperial might… something powerfully scenic like a vast number of their armadas and ships in the skies; then showing them performing something truly devastating that makes the WoL and the Eorzian Alliance shocked to their very core.

To be honest, we have not yet seen the full might of the Garlean Empire and there are quite a few of us who have been mentioning it for a while on the lore forums. Largest imperial force we have had to face was at Carteneau and that was just one consolidated legion. And the only time I have raised my eyebrows in surprise at a hint of their might was when the Gration appeared in Heavensward.