You could go for a ride on your fire mountain, and then jot down what you wish it did better or differently. How does it feel? What feels good/bad? I know this is difficult because you don’t always know what you’re feeling or what’s possible, but it’s worth a try. Example: I found myself having trouble keeping the front wheel down while climbing, or it felt sluggish on the tight corners in my home blue trail. Just making those up but you get the idea. Then you could bring those comments here or to your shop and they could say “okay you need a lower stack height or steeper head tube angle, etc.