I mean, I definitely like additional pics. The only thing I'd say is that it might hinder the different shoes you use if you only include brands that you can find pictures for. I doubt there's a lot of truly erotic images out there for the most expensive brands, mainly coz they're usually kept pristine or thereabouts for obvious reasons.
So I think, use as wide a variety of designer brands as you can, obviously to your taste tho, and if you can find pics then include them, but if you can't then it's no big deal, rather than writing the story around the pictures so to speak.
Also, and this is literally just me, dunno if anyone has the same opinion, and I get this is your version of the story so if it's your kink, then do what you want, but I think you focus a bit too much on LK Bennetts. I know TBF the focus was on the Asics, Superstars and Converse pretty much exclusively tbh, but I think the equivalent to Asics and their expensiveness in relation to high heels are probably more like Chanel/Prada/Jimmy Choo etc. Like, I think you're hitting the low end of designer high heel brands rather than the high end.
But then again I'm a guy that likes variety in my story and doesn't like to focus on one type of clothing or brand loooool so maybe it's just me.
But regardless, the story's amazing. Keep doing what you're doing. Pays great homage to the origin but still offers something new and a suprise.