if anything the edge mechanic, lack of realistic protection from armor and lack of strength affecting melee weapon damage makes it feel less realistic and more divorced from reality / pink mohawky.
For all of 5E's complexity and crunch, it still could never be described as a "realistic" game engine. If you're going to embrace the cinematic physics paradigm, may as well streamline the rules, neh?
@Stainless: I wonder how many tests will involve Strength?
We know that melee weapons won't be pegged to STR to derive DVs. And because 6E removes Limits and Recoil as game mechanics, obviously Strength can't help in those areas either.
But Strength was relevant to more than just that in 5E. Strength was also involved in:
Carrying capacity/encumbrance
Linked to a few skill tests
Grappling/Physically restraining
Archery
Defending against various magical effects such as Levitation, Binding, Engulf
A minimum strength threshold is established to be allowed to wield some heavy weapons (e.g. machine guns)
No reason to expect that any of those won't still be true in 6E unless/until you hear they won't.