We've run PL Downhill B1 for a while on the 24/7 Payload server over at FreeFrag and while a lot of people really love the way it looks, we had a lot of issues with the defense side of things.
Let me first say that the map is visually stunning, it looks great and the Kart path is very well defined. I also really like the multi-exit blu starting spawn and the integration of buildings into the mountain terrain look.
The problem that the majority of people noted with this map is that there are a ton of ways to get everywhere on the map, making it pretty much impossible to defend. The multitude of balconies and overlook points makes it a sure thing that a Blu demo is going to be able to get an angle on stickies to take out pretty much any fixed defense.
The final point is better but the multitude of paths available to Blu make it very easy to spawncamp red and win the map.
I'd love to see a B2 of this with a little bit more closed in feel, less routes to each capture point and more defensable structures.
Thanks for all your hard work and I look forward to future versions of this map.