Doubt it. PS4 has a more conventional hardware set up, unlike last gen where it was totally different and a b**** to work with. Sony also seems to have decent dev tools this time -buying that company seems to be paying off. The xbox one is a little less conventional. DX12 may help improve efficiency and the SDK will no doubt help with the overall dev process, but making it easier than the PS4...doubtful.
This is where I think your wrong. I truly believe that MS will make it easier then the ps4 because they are a software company. MS just got a little slow coming out the gate and SONY just played it safe.
MS will still lead in software and there is nothing SONY can do about it.