With ridiculous price increases, and now the threat of stopping shared accounts, I can see Netflix getting absolutely ruined over this. I think they need to accept that at £16 a month people were happy to pay the premium as they could share.
To me it's basic decision, keep it at the current price and allow account sharing upto the limit, or reduce the base price and then add in the extra premium for sharing. Having it both ways is just them being greedy.
To be honest was happy to pay the premium when it was £13.99 cause you could share without worry and it had the best catalogue of shows generally but now other services have caught up if not overtaken (I would say Prime with movies has got so much better last 12-18 months) and Prime and Disney+ are half the price now and less if you pay annually.
£6.58 a month for each of them compared to £15.99 for just Netflix is not comparable in my view now unfortunately. Will still look at the VPN options and see about that for savings. But otherwise will be down to almost no TV apart from free YT then.