I say keep them in until something gamebreaking is found with them on a much simpler scale. Much like DOA, the game was built around using the interactive arenas, and taking that feature away would only result in butchering the game's unique design.
That being said, there does seem to be a few balancing issues that need tweaked (coming from the demo). Power characters being able to throw a near unavoidable, unblockable projectile for 25% of your health seems a bit much, and like Check has shown, resets making use of the interactables' OTG setups are already being discovered.
I want the game to thrive in whatever way possible, however, I don't want it to become, "that game with the broken stage stuff." So while still too early to tell, we should be putting the competitive life of the game first in future decisions.