As I've mentioned to others, L5 is a bit of a crap shoot. Offence plays really strong at lower levels, so, you know, temper your expectations and attack a lot yourself.
That being said, looks like a pretty good approach. However, your best defence at this level is your squad centre, and yours is all in a corner in the open. If you have anything in it and they choose to bait it, they can, or they can easily snipe it. Also, I think I can 1-star the base with just about 10 soldiers. Alternatively, you are quite open to anyone doing a pure loot run. Your NE shield generator is pretty open on the one side, making it a great attack path. Han plus a bunch of hover tanks coming from that side will make quick work of you, I think.