The world has non-flowing water instead of snow layers, there are random waterlogged prismarine blocks, and lots of flowers are now "half doors" that act more like Spiderwebs, my friend has called it "Valley of the Half Doors" and trapdoors were changed into another type of waterlogged prismarine as well, with no real "breaking" of the game in any other way other than it now makes the normal overworld unplayable, OH and my wheat farm was transformed into some Redstone, or that red Nether vine, not sure, kinda looks like a field of blood now, not sure what it even is.... Can this be fixed? [lost two server worlds from this]

What, I don't think it's caused by Blockus at all but that's weird