I am trying to working out what has been decided, not what has been talked about. Are you saying that it is confirmed that there will be spaces in the coaches and in the power cars?
Those were official design plans for the refurbishment, but designs do change. There will have to be bike spaces which are usable at all stations. that much is in the Franchise agreement. This is unlikely to be able to be delivered entirely through power car bike spaces because of platform length and dwell time issues.
There is no commitment in the Franchise agreement to more than 2 spaces per train. So anything more is an extra rather than a requirement.
I suspect the bit that has not been confirmed is whether there will be an additional two bike spaces (for a total of four) within the coaches. This is what has been requested but given it is likely to be an additional cost, they will likely be seeking TS approval / funding for it.
As you can see in the designs the bike space is planned for Coach C. There are more disused toilets in B, D and E. One of these spaces is being used for Guard's equipment such as detonators etc. One of these spaces is only present on the 5 coach train. But it should be possible to convert an additional space for 2 bikes on every service if someone is willing to pay for it.