After the updated fm killed any kind of speed advantage the Nados had I’d vote to give the F.3s we already have the mk106.
No one wants another f.3 late that’s at a too high br because it carries good missiles. If gaijin even considered adding this it would likely sit at 12.7 for “balance” because 9M. The jaguars and etendard got Phimat pods but not the nados.
Gaijin seem fine with artificially gimping British aircraft to some extent to fill what are always double stand balance rules, the gr1 is an amalgamation of different modifications never used on a singular aircraft and has a weaker engine for no reason apart to get you to grind the gr4. the FGR2 could easily get the 9L and stay at 12.0 which it will see su-33s.
I see no reason to go the other way and add the 106 to help the F.3 out. Again if the gr.1 can have weaker engines then it’s no issue doing the opposite for the F.3. Especially since the FM change was supposed to make it more realistic not less.
Thats either the Torando F3 FSP (ASRAAM + Aim-120C5s) or the Tornado F4 with EJ200 engines and a load of other upgrades like HMD (was a paper proposal)