That's just not true - Elite Dangerous uses the COBRA engine, something that has been around since 1988:
http://www.frontier.co.uk/our_technology/
Making an engine from scratch would not make business sense as you couldn't quickly prototype anything, you would have to create every single backend system, and you would have to train every programmer from scratch. Taking something that is already there and modifying it has it's fair share of headaches, but tends to be better overall.
Also different person - I didn't bring in ME:A. Gimmicky physics effects? That just shows how little you know, and if you're not willing to recognise massive technological barriers, how on earth can you then judge if a project is performing well or not? Also the physics grids are absolutely essential to the game...Nice to see you clearly don't understand what you're criticising.
Do you have any experience with either partaking in, or managing large projects?