Modify dried ghast ability to survive (as a block) conditions

I was playing the update with the happy ghasts for the first time, and the first thing I noticed was that nether lava flows around dried ghast blocks instead of through them (it could be a cool new waterlogging feature to allow water to flow through waterloggable blocks and so on with lava too), or destroying them.  Although there's technically nothing wrong with it, it would look much more visually appealing to either of those two suggestions.