Is my memory failing me? The only trans-atlantic operators who pulled their longhaul services from BHX as I can recall are BOAC (BHX-JFK); Highland Express (went belly up); Air Canada (service was really little more than a spoiler to sink Wardair - successfully as it happened), BA (returned to it's roots an British (London) Airways so far as longhaul is concerned, and American (as a direct result of 11 September and poor front-end yield).
In any event Flywho is not an airline - since it has no AOC. It is not operating scheduled services in the true sense of the word as you can't book from US to UK, and I believe, you can't book one-ways.
I very much hope Flywho does work - and despite the previous false dawns, it seems conceivable that it will, but one thing is for certain. Unsubstantiated criticism and bad-mouthing on boards such as this won't help them.