I really like this maps design and the layout you've got going in it!
But I did stumble one or two smaller issues which can be abused;
1A: The small overlapping pipe element allows explosive classes + wrangler engineers to land/stand there without issue
1B: Though explosive classes attempting to land on the flat areas of the red pipes get pushed off, a wrangler + rescue ranger engineer can quite easily launch himself up and place a sentry, tele exit or dispenser there (Note; Standing on top of your own dispenser and sentry of any level puts you above the effect of the pushing force applied to this area!)
The second 'issue' I came across was being abled to comfortably stand on top of the tall trees at BLU's starting spawn, as a Demo a single sticky is enough to get up there, as soldier 2 rockets suffice
Some of these trees provide a really protected spot for a demoman sittin and tossing his balls down from there