For the people that ask about achievements at a certain point they were done to accommodate jumping from GC to GC. Which should hopefully mean a win is a win. Earlier achievement "Guide the Maelstrom to 100 victories." Original ADS and all achievements after "Guide any of the three GCs to X amount of wins in X frontline."

So the only things that are hopefully lost is horse mount and the chance to get Amethyst Keel, Rose Gold scales, and Ebony Leaf. And since they never even bothered to title or eward the 1k ones its not the end of the world. The couple people I know with the actual 1k wins are probably happier to play anyways.