To clarify.
In order to obtain an ATPL, amongst the other requirements is that of obtaining the multi-crew hours. This is not satisfied by simply having two crew in the aircraft; it has to be either in an aircraft certified as multi-crew, or in an otherwise single-pilot aircraft that is flown as a two crew operation in a manner that is acceptable to the authority. Realistically, most pilots will achieve this by working for one of the offshore operators. In any case, you need to obtain that elusive job flying as a co-pilot in a multi-crew operation somewhere, somehow, with a CPL.
Given that that job is likely to be relatively well paid, at least compared with most work onshore, just how many pilots are going to leave to then attempt to find work flying a jetranger or similar, on an ad-hoc basis being paid for their flight time only?
The reality is that the pilots holding ATPLs under the old system, based, in some cases with little more experience than instructing in an R22, say, are having them exchanged for CPLs on renewal.
The future trend is likely to be that the licence you hold is the one that is appropriate for the type of work you're doing.
Multi-crew Captain - ATPL
Everyone else (amost) - CPL
And as for that fATPL nonsense...
What does your licence say?
What colour is it?
Tell the CAA to send you a cream one and see what they say.