I think there have been pretty much confusion here , first of all f 35 is jndeed used by israel in Syrian conflict .
Second to clear some air , if you think more missile mean better aircraft , look at f 35 , yeah we can incorporate 6 missile , they were planning for iwb having special drop tank , also amca is having enough capability to engage , it is having similar twr to a f 35 , also sidebays are used for wvr missile for combat , but stealth fighter are operated mainly to go for stealthily accomplish task .
Iaf knows it , rks bhaduria isn't that bad guy to fuck up a program in which he has shown confidence , army is a gone case .
Rest about 6 or 4 missile , we can incorporate it in during production , and we can have 6 missile configuration easily . Don't panic about it , let them make a basic 4 missile configuration first