Discredited does not equal falsified. He hasn't been discredited, in fact there's an absence of results showing the claims as falsified. This doesn't automatically mean it won't turn out to be crackpot science but there is not much to demonstrate that it is. In contrast Cold Fusion was fairly well falsified quite quickly.
This actually smacks of a recent cock-up by skeptics, I cite thus:
Many credentialed aerodynamicists (in chorus with most of the internet's "experts") swore black and blue that a wind powered land vehicle could not sail dead down wind faster than the wind (DDWFTTW). It would violate the laws of physics it said. So someone built the thing
... and it worked and went 2.8x windspeed even (!)
... repeatedly. What's more the theory was sound all along, no change of the laws of physics was needed.
Indeed, boldly, emdrive are not claiming any physical laws are violated, that any new physics is required or that any well tested institution is being challenged. When was the last time you heard a antigravity/cold fusion/levitating sasquatch crystal skull claim do that kind of thing? It's a little encouraging no?
Ultimately I think skepticism not backed by proof is just as crazy and as the opposite with the same amount of proof. I wonder if it is just a different manifestation of the same underlying cognitive & personality problem. We'll have to wait and see for real-world results. They'll build it, and it will work or it wont!