It being more PvP is part of the challenge. Same with not using parries often.
I beat the game so I'm nerfing myself, limiting options, forcing style, etc... This may not make sense to many people but it's how you dissect action games. I may try a run where I do viscerals and only attack if they don't work. Or maybe a no gunshot attempt, which would be interesting. So even if something is part of the core system, I have the option to throw it away if I don't see the fun in it anymore. There is legit criticism if you can't kill an enemy with a certain weapon's attacks, being forced to play distance game or rely on parries . It's super nit-picky but still valid.
Drop into any DMC, NG, Bayo, etc... combat discussion and this is normal fare. Once you beat the title the expected way, you go for the unexpected. It's more fun with the diversity and you often discover a lot of stuff that makes you more effective. I'm glad to say that BB has enough depth to satisfy such a system. Also note that this isn't limited to these action games. MGS4 for example is a perfect game to explore its system, skipping cut-scenes the subsequent times of course.
I'm not sure I agree with the trial and error there. Of course you aren't going to know what is coming ahead but the game gives you a clear sight of the hunter in the middle when you enter. You don't see the hunter down the stairs or the one in the dark corner. However, I recall my first play-through. When I got ganked after doing a visceral on the middle guy, I ran away to clear aggro. Then I knew about the other hunters, and cheaped them out. You can kill all three doing backstabs without even fighting.
You can definitely lose their aggro and running out into the street is not a great idea. You can be hesitant and run left to the alley looping back. Or you could run back where you came. They may follow but you can lose them. Maybe you will get lucky and only one will pursue that far, which is another legit strat.
Stuff like traps are trial and error. I don't see this being a good example, it is a fair setup.