I'm cannot see a big similarity between Bitcoin-NG and the concept of using a meta blockchain system.
Perhaps you meant my last post https://bitcointalk.org/index.php?topic=1570198.msg15995725#msg15995725 which describes another design that in fact is somewhat similar to Bitcoin-NG as it makes use of hash puzzles for finer granularity (as opposed to microblocks), making it less difficult for low-scale miners to participate in mining.