I think the problem is that people were complaining again and again about the same things. There were, and probably still are, lots of bugs to fix, but there are also a lot of new records and ways of finding them.
The most helpful posts on here, and other forums, are those from people who, rather than just moaning about the new site, have accepted that FindMyPast isn't going to go back to the old format and have thought, "Yes, it is different but how can we get round the problems." They have then posted useful tips which have helped others. It is a shame that FindMyPast weren't able to sort out the complaints from the tips on the feedback.