Perhaps later.
Imo, Larian seems to have doubt about the combat gameplay / fun with lvl 1-4 characters. I am quite sure they are more confident in the global game balance at lvl 5-10.
For those not familiar with Lvl 5 in DnD 5e, let's just say this is a big step in the character evolution. For now we probably test what they are most interested in.
I personally, HATE the concept of "tiers" on 5e, one of the awfulest aspects copyed by 4e and the "power spikes" on lv 5/11/17.
I prefer the 2e approach where lv 1 = beginner and lv 20 = peak of humankind. Above 20 is superhuman. The dealms of dread suplement for 2e uses "accomplished necromancer" to refer to Strahd, as a lv 16 specialist mage(necromancer), Meredoth is a lv 20 necromancer in the same sourcebook and is also considered "accomplished". The power growth was more "linear" and coherent IMO.
