Is there a way to distribute or blend objects using a ratio?

In many cases you can use the Transform effect (located in the Effect menu) to do stuff like that.

Also, the Rectangular Grid tool with appropriate Skew settings may help.

For reuse I'd recommend to take the results from the ways mentioned above and create Art Brushes out of them.

If you're talking about "accelerating" the object spacing of a blend I think the only way (currently) to do that in Illustrator is by altering the blend path so the anchor points have direction handles. You can adjust the length of the curve handles to make the spacing more tight or loose on either end of the blend.

I would prefer it if some other controls were added to live blends so they can be accelerated in a more straight-forward manner, maybe even with numerical input as an option. With the current setup it has to be done manually.