In the KSP engine, water is literally almost regarded as land. If anything in Kerbin's water goes past it's impact tolerance rate, it immediately would explode. In order for an update like that, you'd really have to convince Squad, because they have tiny resources working on the actual game. Have you seen the devblogs? only 1 or 2 people are working on the game at a time. The rest are working on the forums, the ksp webpages, the installer, FAQ's. Squad is too underpowered.. I would actually be willing to work for them if I knew how to program and if I wasn't a 15 year old teenager.