Irrelevant given that we have SW coming.
Did
you gather any opinions from miners asking them how they feel about creeping towards 1.75 MB equivalent sometime in 2017 with a soft fork that leaves all non-latest-Core-software nodes not validating transactions?
The 75% increase is immediate
once the code is implemented.
Third-party software a free to enjoy additional headroom by adapting their code.
April 2016 you said somewhere else?
Also, you will be functionally knocking off quite a few nodes from actually being nodes. Only 2000 of the 5500 nodes are running the latest Core release.