I haven't played this map, but I read a walkthrough. I especially remember the battle against the Lazurites, where you need to take cover using the trick with the wall of fire. It seems to be the first map where something like this was implemented.
I think that the only one who could compete with such a map in terms of thoughtfulness and, possibly, difficulty is Rose Cavalier. At least, of the remaining active Heroes of Might and Magic map makers, only he has a sufficient level of knowledge of the game mechanics, hex editing, and programming to create something fundamentally new.
Season hasn't been active for a long time, and I haven't heard anything about Aeris either. BioBob wrote that he decided to switch to WOG. And that's not surprising. It's quite difficult to create something original in a game that is already 18 years old; mastering the usual editor becomes insufficient, and other, more complex skills become increasingly important.
BioBob and Aeris set a very high bar after Season, both in terms of difficulty and originality. By the way, Aeris's maps are somewhat underrated compared to Season's creations, although there are even more original features in them. Perhaps this is because most people prefer to play XL-sized maps.