While the oil price is in this current regime, there will be increasing moves away from heavies as for most oil companies, the main driver in all decisions is price. The costs of heavies make them uneconomic in comparison. The H225 is dead in the water commercially unless Airbus can cut their hourly DOC/ PBH dramatically and the leasing companies accept the hit and drop the lease rates dramatically. Even then, it's reputation is still in the toilet.
It goes back to the Air Advisers and C&P people at the oil companies - who is going to sign up their workers to an H225 contract? Answer - no one for the foreseeable future.
IMHO AH would be better off focusing on selling what they have to militaries and spending their time and money creating something else.