First one, not sure it's a bug, but a lot of times (any given base on any given map with different types of bombers) I will have 1 drone droop quite low in a turn if I am not far from take-off and start a turn, and not just a "he's staying in triangle formation" droop.
This is a B-29 showing how low he can go, he actually went underwater before I managed a shot:

Next is the Lancaster missing Poly.  The Ki-67 I think had it a while back.  When a flap gets shot off the back engine poly goes with it:


Next is the B-24 having some Bomb issues,  I had the 2,000lb bombs equipped and felt a little saggy underneath:

Next is the C-47 shadow issue (possibly being address with the new update).  I show having a V-stab and an errant landing gear in my shadow, something I lack in reality:

Finally is the 'seeing base through a hill' issue.  This isn't limited to 1 base or 1 map, I see it all over:

If it makes any difference I run:
 2048 Textures with Hi-res Installed
 1680x1050 Resolution
 2048 Shadows with Smooth shadows enabled (Shadows on others not on)
 Max Detail Sliders
 Detailed Land and Water with Bump Mapping