Let me add a /agree to that post and the suggestions.

But same as above: Bombers are not that slow. I remember a scene where B-Wings followed a group of X-Wings through a accumulation of rebel ships at the battle of endor with a average speed (think it was in the classic triology or I remembered a scene from a game.)

One thing I recognized, too: Your rate of manouverability for Y- and B-Wings is a bit too low in my opinion.
If you watch the films you can see (in those few scenes you get a clear view) that a Y-Wing is a bit more manouverable and a B-Wing, too.
If I think about it 15 must (or better could) be something around the manouverability of a B-25 from BF1942 and if we try to remember we know how long it took to fly a turn with that medium bomber.