Amirosu is one of the pretty legit nero players but i don't think his style is really standout. His neutral is very vanilla and un-nero, but his pressure is that of a serious and adept crescent nero. That said, i think you're misinterpreting the context of the match you linked to:
1. The kind of strings Amirosu was running are not rare to see very experienced nero players doing (although frankly, most of the nero player's i've seen in mbaacc videos look like they've been playing nero for less than 6 months). The ideal situation for every nero player is to lead into that kind of safe pressure that you saw BUT
2. Many characters have escape options against that kind of long pressure. F-ries happens to have a terrible matchup against nero and only her one ex grab to escape from pressure with some degree of reliability
3. Most top players won't take that shit sitting still. The ries player in that situation was being unusually cautious so Amirosu was allowed to style on him hardcore. This is perhaps because Amirosu had scared him into blocking by using mash-punish 4c frequently in previous games and perhaps because Fries sucks at dealing with nero.
The ries player also kept failing to block correctly, allowing Amirosu to reset pressure that otherwise would have ended.
In short, what i mean to say is that many good nero players are aiming for that kind of scenario but there are so many factors along the way that can stop it from getting there that the match of Amirosu is less of Amirosu opening a new path and more of Amirosu being lucky that all the stars aligned and he got to follow the oldest path to completion.
The zoning/guard breaking you're referring to is not some kind of separate playstyle focus but is part of the safe pressure. Safe pressure can only be achieved by punishing escape attempts so that the opponent blocks and allows you to go into the safe part of strings. No offensive protocols are omnipotent.
With all of this said, i have to admit that Amirosu is one of the best and one of my favorite nero players in japan. I don't think that he's overcreative but rather that 90% of GOOD nero players in japan don't really harness the unique abilities of the character because they can just get by with strong basics.