I think they used Cecil as a model. Big ass pauldrons and greaves.
Now that you mention it, these do look FF4 inspired. I think they look more Kain-esque, though.
Boba looks great, and I think it works for him. However, it's sort of like they took the same body style and used it for multiple figurines.
The Storm Trooper should have less detail, look less like a badass, and definitely be a brighter white instead of trying to make him look "weathered." Frankly, needs to look more like a bitch.
Vader with a 6 pack? ROFL. He looks like they took wolverine and slapped black armor on him or something. Needs to be wider and less "defined."
Also, the weapons look generally terrible.
More detail != looks good, sorry Square. I'm sure people will buy them for the collector value, but I would only buy things I think look worthy. Looks too much like they just genericized everything and threw different colors on them.