You're essentially asking for a toned down version of Savage as an intermediate, which defeats the entire purpose of learning the fights in Savage itself. Normal exists both for story progress and a showcase of what Savage will offer without revealing everything. Adding a "practice" mode would make Savage even easier.
EX Primal are the intended gate way into harder difficult for those wanting to go into Savage with more confidence. If you can do EX Primals, you're pretty much set for the first two Savage fights.
