In the context of the PPH would the EPO grant applications claiming subject-matter that does not fulfil the European Patent Convention (EPC) patentability requirements even if these applications have been allowed by the OEE?

No. As a matter of principle, the legal framework governing the grant procedure at the EPO remains fully applicable to applications processed via the PPH. This means that these applications have to fulfil patentability requirements as defined in the European Patent Convention (EPC) and the relevant case law.