EY new policy v16 issued today (the agents version) is that for travel until 30 September inclusive change fee and fare difference will be waived, however same RBD(!!!) is now required. Change of origin/ destination within same zone is still permitted.
Well, what can I say - EY proved to be not very customer oriented (mildly speaking) by worsing the policy terms for those who planned to travel before 30 June...