I am just thinking an option of adding a pinned Review on top of all reviews of gigs?
May be 3 to 5 the best and detailed reviews from happy buyers describing their service which will get more attention for the new buyers when they are reading the gig reviews. Currently, we cant guarantee that a buyer will write a detailed review and most of the reviews like a “great job”, “Excellent work done and delivered on time” like these simple single line Reviews.
An example is like this screenshot. Please Note these are my own created samples for your reference only
P.S: I am afraid there are some sellers may misuse this like ordering their gigs mutually and write the best reviews to showcase better and get more attention from new buyers. I don’t know how they control this mutual ordering for review exchanges.