Would the fact that Sensei Ando also practices Bjj have anything to do with him suddenly "discovering" Karate ground fighting?
He didnt "discover" it, that moves always been there.. Other schools have taught that move that way. Attributing it to him would be like saying the Gracies invented the Armbar. Not to mention the examples Paul D and K-Man gave from other forms if you'd like other examples. At this point, you're simply in denial because your Shotokan was lacking so you assume all else does as well.