If devs want to appeal to Valve to have more people available to vet reviews that developers find objectionable, then be prepared for Valve to take a larger cut of the purchase price. It is a service that they are providing to the developers and that costs money. So if someone wants to offer to pay Valve a higher percentage for this service they should propose that to Valve. So far I have yet to hear anyone propose that most simple of solutions.
Devs should not be handling any reviews and they should have absolutely no power whatsoever to unilaterally decide what is acceptable and what is not. That is not their right. Consumers should have a right to express their opinions.
Finally, many of us have played games for 6 minutes that are so horrendous that we needed no further time to make a decision. Games that did not load at all. Games with graphics display problems on some cards (Empire: TW did not display properly for certain graphics cards for 4 months after launch). Games that curse at you for pressing the wrong button (I am looking at you, Cargo Commander). Games that had unresponsive control schemes that render the game neigh unplayable or did not support controllers they said they did. The list goes on and on. You think none of these voices should be heard? What gives you that right? And let’s just say you did remove the 6 minute reviews. So what? I can let the game run for 12 minutes before reviewing it.
One person’s invalid reason is another’s valid one. Ultimately for the vast, vast, vast majority of games the review system provides some aggregate idea as to the consumer acceptance of the product. An attempt to try to weed out the statistical outliers will do nothing but prevent many more “legitimate” reviews from being heard.