It's all very well to say, without the speed limit nothing would happen, but we have a model here where there are far fewer mysterious givens. An explosion backwards is co-ordinated by a common cause. This is where Mach's Principle just falls out in r3. There's still some staring into space and trying to get a geometry that fits to be done. But I think the deadlock is broken.
Theories hatch like turtles.
The first few minutes are the most dangerous of their lives. With every minute that passes, probability of survival for a long while goes up. Gross Evidence Spiral galaxies are entertaining things. We can have a low mass universe, slamming together on co-ordinated trajectories irrespective of gravitational closure. Just roll up a length of paper into a tight cylinder, and let it unroll.