Well that's interesting. For me 99.5% of websites work perfectly using ublock origin. The only .5% remaining are websites that actively refuse to serve any kind of adblock users, not because it breaks functionality on their site.
I don't think I can recall having visited a single website that would have features break unintentionally because of ublock in the past few years.
That sounds pretty interesting. Mind elaborating on what changes you achieve with your modifications?