You keep asking, but YOU give none.
How can you prove that it's a new engine? Did you look at the tank clipping, did you look at the mortar smoke that's never on sync, the horrible performance with the release date just 3 months away?
Can you, for one, back up YOUR claims?
Can you read? I never made any claims. Im questioning yours because they have no basis.
Either
A: Put up
Or
B: Shut up.
You keep like a child, spewing senseless BS without actual evidence. I already know you have no proof, you're throwing conjecture and guesswork randomly and grasping. Things like performance, lack of changeable hotkeys etc (which they've promised, might just not be yet implemented or whatever, if its not a thing by release then shame on them) are just things you claim to be the exact same engine, but none of these things actually prove that.
It be like me saying let's say... fallout 1-2 use the same engine as fallout new vegas because both have extreme stability issues.
Of course I'm happy to be proven wrong, any evidence, just a shred!