A distinction must be made between DDA the organisation and DDA the Authority. the latter has all tiers of government and others and appoints committees etc, all under DD Act, and if these act de-hors of the Act, there is no point blaming the former.
Public Notice process is better viewed as safeguard to mind against downsizing of Plan entitlements / solutions rather than as alternative-Plan pushing opportunity. DMP-2021 is not new Plan but Plan revision, ie, rather than commenting on it in a vacuum, it is more meaningful to comment on comparison between DMP-2001 and DMP-2021. (Never mind larger promises of world-classiness and this or that; each little provision of DMP2001 is entitlement and it is the job of planners to cook up larger wholes without
downsizing the parts).
Please note: logical culmination of DDA-bashing / DMP-2001 ignoring trends is blind-men-around-elephant local-area-plan style urbanism in care of MCD / GNCTD
multiplicity and its growing bhagidaars.