Well, in my opinion BMS is a F-16 study sim and it’s very complex and precise.
By using / superimposing / attaching different 3D external and cockpit models (Harrier, MiG-29, Tornado, F/A-18 etc) players get a variety of planes to mess with but all based on a “tweaked” Falcon. This is actually good 'cause spending years developing a free Harrier module (keyword is free) for only a handful of players that are really interested in Harrier and are avid Harrier fans is kinda timewasting, don’t you think?!
For instance, I strayed away from DCS ever since it became DCS and stopped being Lock On - Modern air Combat where keywords (at least for me) were MAC. It’s kinda weird and historically inaccurate flying P-51 over Georgia and to be honest, although a great and probably the best piston engined fighter of WW2, P-51 is something I’m not very interested in. When I am I run other WW2 focused sims like for instance Sturmovik.
You may ask why’s there no Harrier dedicated sims and the only and most correct answer would be a lack on interest by flight sim population. That sim would end up being a great sim for few of You, I’d never get interested even though it’s a VTOL aircraft, something that’s worth just spooling to see how it really works and how it’s modelled in 3D world. Let alone other less interesting jets.
Look at DCS: L-39C Albatross module - detailed to the rivet and I believe it’s made really good but in the eyes of Virtual Breitling Team it’s a best DCS module ever going to happen. I’m not gonna play it though 'cause I can only do stunts with it, probably slightly better stunts than with an average Cessna 150.
So yes, flyables in BMS are tweaked Falcons, if you zoom out external view You probaply won’t notice…