I just tested FH2 2.15 with BF1.5
Tank views and Airplane views are fine, nothing broken there.
I did however notice a few Alpha channels missing. I played with a 1680 x 1050 res, 8x AA, all settings done ingame. Rest of the settings are high. I must admit the game looks better now that I can choose the ingame resolution settings.
I did a test with widescreen fixer running in the background, when I switch the widesreenfixer on nothing changed on my screen. So I took my words back widescreen support and widescreen fixer give you the same FoV, otherwise widescreen fixer would have changed the FoV a bit.
Beaufighter: