1. Not many maps have respawns in front of a cap point. I would do some testing on the avg. time it takes to get to the next point on other 5cp maps and apply the same logic here... so move the respawn.
2. Second cp is poorly designed, it needs to be more bigger with some higher ceilings, and possibly some shit for Scouts to jump on like a box. Reduce the width of the walls that's in between the control point since it'll adjust for better sniper sight line and quicker surprise attacks.
3. I think Granary would be the only 5cp map where you can't rocket jump/sticky jump onto the point from the first door. Remove the shit in between the spawn/last. If you make 2nd bigger, it should eat a little of last so it gets a bit smaller (which would be good).
4. The crates really kill it, but it's what makes mid. Instead of 2 crates that stack up to say 50 ft, replace it with 3 slightly staggered ones that stack up to the same 50 ft. Maybe instead of four sets of 3 crates, you could do two sets of 3 crates (50 ft) and two sets of 2 crates (~33 ft). I would slightly increase the height of the garage door so you're not totally shitted on.