I think students with experience are great for courses, and applications from these sorts of candidates look great amongst piles of identikit young over achievers.
https://www.london.ac.uk/courses/international_type_of_study...
I have a decade of experience in software development and a smattering of Coursera certificates in relevant areas. Doing a BSc feels like it would be, not a waste exactly but inefficient and overly expensive. But it looks like University of London they offer a PCert->MSc pathway for CS.
Did you do the micro-master because you didn't have (much) relevant experience in the field? How important do you think it was on your application?
I did it so I could show some reason to admit me to the course. Absent any relevant work experience they needed some evidence I could think think and write. They asked for a notarized copy as part of the application process. Legible bureaucratic qualifications are a good thing to have if you’re trying to get another legible bureaucratic qualification.
https://www.london.ac.uk/courses/msc-computer-science#progra...
I went through one myself and am currently working on my PhD. If you have a relevant career or just come off as pretty mature a master's program will be happy to have you even if there were issues in your undergrad, but very few institutions worth going to will admit you without a bachelor's of any kind and the circumstances would have to be something truly remarkable.
If you already have a successful career in a non-credential field it’s unlikely getting a vanity credential like a taught Master’s will do much for you, unless it’s a finishing school proof of class habitus like an MBA. A Ph.D. like an MBA is good for changing fields and perhaps social class entirely but it’s unlikely to pay off in monetary terms.