It's hard to say as anyone else that's any good ran into elite level players in this ASL or didn't play (Zero apparently has issues with making the qualifiers with where he lives or something). It's quite possible, SK would probably have ended up a top 8 overall player if he was allowed to progress as he was doing before SC2 happened, while it's possible that he is already he's not been back on BW quite as long as other players. In terms of who's doing well in Afreeca showmatches, of which there's enough sample size that it's not insignificant, he doesn't feature in the top 10.
flash has been crushing fast guardians for decades. he's never not going to see it coming and if you see it coming it's fairly easy to defend against. soulkey probably still loses from that point most of the time but I feel like guardians is literally 0% and he should've tried defilers