my dear brother like you I would love to see this plane carry as much as SU 30 or F-15 but lets be realistic and keep its entire body in mind.
it can only carry so much as its fuselage and the space on the wings allow. and then there is a question of weight which may need more powerful engine which again may need bigger frame.
so, in the end the extra hard points or pylons with extra weapons or WE pods will be competing with each other and existing weight to make a viable war ready jet
say the new engine is in same size but is more powerful then it might give the jet extra speed and more maneuverability but it will be compromised if we go for more weight.
extra weight of extra and heavier more powerful items will work against its T2W , its speed, its endurance and its maneuverability its a delicate mix and I am sure Bk3 will be an improvement and if we really want more on it without compromising its performance but we might need a bigger plane JF-18?