Block_size_limit_variable = 2000
There's 5.5% of the nodes that already support that, with the Core dev team backing that change, I'm sure 95% (that being Theymo's threshold for "consensus") can get behind it pretty quickly. I'll let the miners decide...
I believe a lot of folks already appreciate that an actual increase in the blocksize limit from 1 to 2 or 1.5 or 3 or 3.72682 mbs would be pretty easy and even quick.
Part of the issue concerns whether any block size limit is necessary at this particular time and whether there is some kind of emergency on the horizon that would justify making an immediate upgrade.
Accordingly, if such an increase is not really necessary (which seems to be consensus), and there is no emergency (seems to be consensus), then the fact that it is easy to upgrade would justify waiting to upgrade rather than rushing into some kind of blocksize limit increase that is not necessary.