Put another way: I think we are behind the curve. Making a steeper curve to compensate could really throw us off in the future, but adjusting the Y-intercept to put us back on track, and then making a good guess about the future would be better.
+1
A correction now and then less aggressive growth going forward could be a better idea.
... or begin with 50% growth then have a halving of blocksize growth every 4 years?