I don't believe following bitcoin's distribution model is the best idea if you want to create a "currency". Odd I know, haha.
This is mostly a separate discussion, but either complete-information monetary policies are best, or human-controlled ones are. The idea that one tweak of some complete-info algorithmic policy is better than another tweak of a complete-info algorithmic monetary policy is ridiculous and fundamentally misunderstands what monetary policy does.
Specifically, monetary policy in the central banking era seeks to attenuate peaks and troughs of natural economic activity through explicit human action. The overarching assumption, which is probably correct, is that the instantaneous supply optimum for some future date cannot be known with much certainty beforehand. So the solution the world has come to today is to give control over that supply number to a studious committee of economic custodians. The idea is that they'll be better able to determine today's optimal supply than some pre-set policy.
Bitcoin changes the question entirely and simply posits that maybe perfect knowledge of future supply, by all economic participants, will allow for more optimal allocation (by businesses/humans) today, and that perhaps this will more naturally attenuate the tendency of economies to generate large peaks and troughs. Whether you have a monetary policy with a fixed supply, 2% inflationary forever, or something else, shouldn't matter in this context so long as all economic participants have complete knowledge of the dynamics. So trying to tweak the alg doesn't matter.
But adding alt-coins that don't support the dominant monetary policy (bitcoin's) does matter, because that action implicitly erodes the perfect-information base of this entire experiment.