Hopefully BGM are changing things, especially after the positive response their editor gave to the feedback on here. I do feel that magazines like BGM, and also Top Gear (as mentioned above) tend to review expensive luxury basses (and cars) more for the reviewer's own benefit than the readers' benefit. Kinda like a "hey this is a good gig, I just get to play with very expensive toys all day and say how good they are" attitude.
More of the £300 SUB bass reviews would be great. Would you buy a £7,000 bass on a magazine review? Or would you spend a day with the luthier/manufacturer instead to make sure it was a worthwhile investment? I believe that a fair amount of bass players are likely to be in the £200-£1200 price range for basses. That's quite a range but still below what I believe to be the average price for all of the basses reviewed in a single issue of a magazine. And I think people are more likely to buy a £300 bass based on a review than they would a considerably more expensive one.
Having say that, remember that even if BGM started taking on all of our comments immediately it would take time to set up group tests, write them up and get them published so any new ideas could possibly be 2, maybe 3 issues away from when they were incepted.