It's a smaller aircraft than the AW189 (apparently now potentially going from 16,500 up to 17,180 vs. 17,900+) and that's probably why they're rushing to increase the MTOW... because it didn't have the capability required by the major operators.
I'm sure it'll do ok, but my guess is with the delay that they had, as Ian said, it's given time for the AW189 to get into the market. That aircraft has the performance that offshore guys want and I predict it will eat the EC175's lunch (70/30 split).
The 525 is reportedly going to fly at the end of the year, but we know the track record with these size aircraft and schedules. Not sure what operators are going to hold off until that certifies, but it's also a bigger aircraft according to their site... so maybe the EC175 plays the short/medium offshore and VIP role, whereas the others do the heavy-duty lifting.