Free flight compatability issue

Could the devs make the new free flight backwards compatible with the IM39 suits and the old free flight skills compatible with the new suits( its basicaly THE SAME @!$%^ SKILL ). Ok, so I wanted to get the new wings because in flight they look amazing with the IM39 suit BUT when I got them it turned out that you need the new flight skill for them to actualy open when you are in flight, so i bought the new flight skill. . .and the moment i learned it and tried to use it it said "you dont have the appropriate bla bla to use" so you have to get the entire set or nothing atall BUT i dont like the new suit combo as much as the IM39+new wings combo so basicaly i just wasted a ton of money to get things I cant use. . . I do realize that the devs need to make money from the game so they need to push out new things BUT wasting money like this just to get the middle finger makes me rage like crazy and want to install a random mod that lets you use costumes instead of buying them and not throw money at you so could you please make the new and old flight skills compatible with all flight suits (LIKE THEY SHOULD BE. . .esspeicaly since its probably just like 2extra lines of code).