Beagle makes the point regarding wing loading, with 2 donks per side, you couldn't feasibly hang 600 Kilo's of wing pod outboard of them.
I'm sure he will agree though that budgets and requirements can draw various interesting ideas with regard to platforms and their uses.. The comment regarding a centreline refuelling system for use as a less expensive tactical tanker may be someones cup of tea, but as part of a wider force multiplying capability, something like the KC-390 or KC-130 would be much more attractive to those with the funding to match the aspirations.
As with everything, capability and functionality is just a question of money, how much capability can you afford?
FT