Everyone is entitled to their opinion. For me, it boils down to this:
Whilst this is not a 100% accurate scale model of the real thing, I think the painted samples (nobody will be buying the EP after all) look very convincing to me, especially at “normal viewing distances”. I don’t know about anyone else, but if I look at an N gauge train running on a layout, I do not put my head right up to it and fixate on one small detail, but appreciate the train as a whole. If you want something that stands up to close scrutiny, larger scales are available. It’s not perfect, but it’s far from being a “right old mess”. If you don’t think it’s good enough, don’t buy it! It'll be a long wait for the next one to come along.
PS. It’s fine for people to point out errors on here but if you care enough about it, why not make those comments directly to Dapol as well? Several people, myself included, already have. These days it couldn’t be easier!