Why are you all afraid of the hybrid globe? Do you have a phobia of water?
Yes, we are both dirty pigs and love rolling in the dirt.
Are you trying to get kicked out or what?
If you must know, I didn't go that way for two reasons:
1) UFOs crashing into the ocean create a lot of problems, mostly related to the fact that crews would die and you'd get most of the craft intact. And I didn't want to get into making underwater versions of all enemies (both for design reasons and required work intensity).
2) With the Geoscape palette we have, ocean textures just don't look good.