Yes, it is a cool and interesting boss room. I like the design as a random fire generator. As a boss room for another boss to go in, it works very well. The fire waves cover a nice area while leaving ample sides to stand in safely.
I made a level that has five Fire Man fights with unique boss rooms: (Link:
https://megamanmaker.com/?level=501453)
What I learned when experimenting with Fire Man and the Relocators are these guidepost / rules:
(1) All fire must exit. Even looping them outside the arena will slow the game down as it chugs to load a billion of them.
(2) Too many relocators = too many visuals to track. Fire wave movement in a relocator is different than a straight up fire wave attack in terms of player processing. The changes in direction and amount of fire waves can overwhelm the player visually.
(3) Don't let fire waves completely shut down an area in the room by having relocators with overlapping pathing (+ formation). Have enough separation between fire wave attacks and relocator pathing for the player to still move in and out of.
This boss room follows those rules well! The fire waves exit on the bottom. There are only two relocators, well spaced. The pathing does not overlap the same area letting players move in and out of the danger zones, and there is ample space on both sides to escape to. Level makers should remember this design. Great job!