My opinion is that any rating guide is going to be based on someone's opinion. Say anything bad about a particular brand and someone will defend it. So apparently whatever it is fits them. What qualifies one persons opinion over any others?
Complaints can be read on this and other RV forums, particularly when there are brand affinity forums. You have to evaluate those complaints and see what fits you. You have been on this website for a few years, and if you have been reading right along, you should be able to easily tell what brands are OK and what brands are not. Then within those brands one can search for floorplans on the manufacturer's website.
Using this methodology, you eliminate brands that should be eliminated, regardless of what cool floorplan idea that manufacturer came up with. It takes the emotion out of the picture and helps to keep you from making a bad decision.
It is pretty easy to buy something and then stumble on something really cool a month later and have buyers remorse. Buyer's remorse is purely an emotional response. If you made a decision based on logic, then you made the best decision. No reason to be concerned about buyer's remorse.