First of all I want to say the new models and skins are amazing to behold. Now on to the things I noticed.
Hanger Defense platforms - The new model shows up while it's being constructed but after it's finished it switches back to the vanilla TEC hanger,
This is after I upgraded them to have flak cannons, dunno if that's relevant. I didn't notice if was like this before the
upgrade.
Forrunner Wormhole Generator thingy - It looks amazing don't get me wrong, but it's not big enough or something as when a large fleet jumps into its
gravity well half of the ships are inside the structure and you cant see them. Also any icons show up behind
the structure effectively making your ships hidden unless you angle your camera just right.