Nice idea but ... until access to Rainham Station is sorted out it is useless!!
Until road access to Rainham Station is made safe for cycling it is pointless plus Beam Valley Country Park is not maintained by Barking & Dagenham Council, therefore, cycling to Dagenham East Station is also impossible.
So, what is the point of building a new estate and making it available for sustainable transport when there is no way of cycling safely to a station that gives access to Central London?