i can tell you without playing it that your spawn exits on point one are placed poorly, move the cap point up a little bit, put the spawns up top on the ledge and put up a smallish barrier so spawncamping isnt so easy when capping last.
your middle point seems forced, almost as if you really wanted to use that radio transmitter thing but didnt know how to incorporate it. people like to jump onto points, aka not hit walls on their way in and demomen will just destroy what you have there
point two looks fine from a screenshot but a little elevation never hurt anyone
edit: looks like a REALLY good start. let me know if you need any help/testing