Well before we reach VISA levels, bitcoin will hit $100 a piece and there will be much more incentive to tackle the issue. The closer we get to the scaling problems the more resources we will have to tackle them. I'm not worried.
Do the Dev's have an actual plan? You know -- with projected growth estimates, and various deadlines and coding milestones to achieve based on that? And where can I dig around for such info?
There is not plan of that detail that I'm aware of. If you're so worried, make one. That's how open source works. We have a wiki and a mailing list. Lay out a basic schedule and ask the bitcoin-dev list for feedback.