Not regarding to the complaint of the tech tree being to long or saving RPs, the Mig-fighter line is the only line where you have to research 3 consecutive Tier VIIIs for Tier IX.
From my perspective, stacking 9-12 and 9-13 is reasonable, with precedent such as J-11 and J-11A(same plane model with extra RVV-AE and MAWS), JAS39A and JAS39C(capability of carrying FOX3), Barak II and Sufa(different model and weapon but both F-16s). Mig-29 9-12 and 9-13 are:
Both early Mig-29s.
Same engine but slightly different FM.
Similar in Weapons(Same R-27s but way better R-73s for 9-13).
Repeated method and experience of playing.
Opinions for stacking/grouping?
- Yes
- No