The current "Best rated rigs" is kinda unfair towards other miners as people vote more then once on the same rig and others get no votes at all as not all people leave feedback.
In the current situation people with 99 good rentals without feedback have no chance against people with 9 positive and 1 less positive feedback due a lack of score.
Best way is to remove the entire "Best rated rigs" section.
I also would like to see a few changes to the search filters..
Small < 1Mh/s
Medium < 3Mh/s
Big < 6Mh/s
Farms > 6Mh/s
Best Rigs section definitely needs changing, or removing if it can't be improved.
As for the filters, i think they're fine at the current values. You would have way too many rigs showing as 'Small' if you added an extra 1MH, because everyone with 3 cards would suddenly be there, same with 6 card rigs and the 'Medium/Big' sections. It's balanced quite well towards current card hashrates right now.