it's really a simple thing. DO WE NEED IT? Is the current limit affecting us or not? Have we reached a point where it is not enough?
Today no but properly done a hard fork is a 6-9 month process. Hell it almost took that long for P2SH. We are roughly 35% to 40% of max capacity and txn volume over the last year (in a major bitcoin decline) still doubled. Over a longer period of time it has grown more like 3x to 5x per year. Waiting till 100% of blocks are 1MB and there is a 50,000 txn backlog is probably the wrong time to start discussing the issue.