The reset will fix the 1.8 bugs that have arisen in the survival server. Due to the border extension, a lot of the world map is still 1.7 biomes. Therefore there is some glitches. For example, villagers are not useable in 1.8 if in a 1.7 biome, <- That was correct last time I checked. There is many other bugs/glitches with 1.8, also.