Agreed, those are some strange choices (especially the Gr. B races). But, all in all, I still believe there's potential for different events & championships to make "GT League" bigger and better. Stuff like this would be nice, to start with:
- Gr. 3 Championship (Professional, Gr. 3 cars only)
Gr. 4 Championship (Professional, Gr. 4 cars only)
- X-Bow Battle (Amateur, One Make: KTM X-Bow)
- TT Cup + (One Make: Audi TT Gr. 4)
- Ferrari Challenge (One Make: Ferrari 458 Gr. 4)
- Raging Bull vs. Prancing Horse (458 Italia vs. Lamborghini Huracan, N600)
- Homologation Specials Battle (Gr. 3 & Gr. B Road Cars only)
- UK vs Japan (Country limited, N700)
- Italy vs Germany (Country limited, N600)
- Custom Muscle (Chevy Nova vs. Mach Forty, N800)
- King of the Isle (One Make; Subaru WRX Time Attack)
- Renault Sport Trophy (One Make: R.S. 01 Gr. X)
- Silver Arrows (SLS AMG '10 vs. AMG GTS '15, N600)
Bull Fest (Lamborghini Only, N800)
PD can also throw some missions/hotlap challenges in there for some extra variety.