I played around with the mod since I got up this morning and I really like it. Wings are still able to be shot off, but it takes a lot more effort, to the point where your time is better spent aiming at the pilot and engine (as it should be). I checked how it worked with weaker winged aircraft such as the Dolphin and even then it still took a good amount of time to shoot off the wings. The AI seemed more likely to rip off a damaged wing due to a stressful maneuver than me shooting it off sometimes.
One beneficial side effect I noticed with the reduced lethality is that it displays the damage model a lot more. Meaning that the damage appears on the aircraft much more gradually than normal, whereas without the mod aircraft sometimes just disintegrate after firing.
I don't know if this is a parameter that can be changed, but the engine mounts are really weak, especially on the Felixstowe. Unfortunately, it still only takes a few bullets to cause the engine to fall off and take the wing with it. I also spent some time shooting at the bombers and I spent a lot of ammo on them which was good as well.
I think it would be interesting to have a mods on server with this so we could how it effects MP. A couple of scenarios that I think would benefit from this mod are the Twin Vickers Sop Tripe vs Albatros, and Albatros vs Sop Pup. I could host a server to test this but my connection doesn't seem to like more than 6 people, but if that's something you would like to try let me know.
The mod is limited by constraints out of your control, but its still good work!