Rafale has Frontal low RCS as well as spectra active cancellation which adds to its signature reduction. Both Rafale and would TEDBF shall be without internal bay. You are basing your statements on assumption that Rafale shall remain standing there. It shall see possible upgradation in next tranches' too. Now unmanned maybe or may not be incorporated. As they have other programmes like neURON and FCAS- and dassault would love to sell those when they are realized. If the latter gets delayed, you shall see further upgradation of Rafale. Also wrt engines, right now TEBDF doesnt have any thing decided. And they are currently trying source british, french or american engine solution.
@BON PLAN may have more insights on rafale future roadmap.
Remember navy said its 5th gen -. not 6th gen - nor 4th gen ++