Crossair ordered the aircraft prior to the reorganisation of the company as Swiss, and as with their other EMB-170/190 family aircraft, they have constantly had to delay these orders, as they do not have the funds in place to put in a new fleet type. This may change in the future.
I'm sure that Jet Airways of India is now considered the launch customer for the ERJ-175, after Swiss bailed on that product too. Perhaps the same thing has happened to flybe.
The EMB-190 family aircraft have attracted JetBlue as a very high-profile LCC and if the aircraft is as comfortable & airline-friendly as the E170s, I'm confident it'll be an excellent type for flybe.