You're assuming a market and prices will always adjust to technicalities of supply only. That may sometimes be the case but cryptos offer a pretty good example of when that's not really true. Let's say the changes are made. What happens if the price reverts to where it was, or just doesn't move? Is that because the adjustment wasn't big enough, or simply because holders are willing to sell at that price?
You're also then assuming that the infrastructure in place can smoothly adjust to those new technicals. The whole point of devcoin is potential inclusivity for the big wide world where mining is something involving the ground - ie. everyone - changing their terms of participation changes the basic rules.
On the mBTC issue, all I was saying was that decimals are avoided, which some think is becoming a perception issue for btc. I wasn't inferring anything about relative prices.
Basically I think relative supply has pretty much sod all to do with crypto prices. Yes there are obvious trends but try building difficulty and other input adjusted models and trading on that (as I and I bet many others have) - it's almost irrelevant as a simple price move determinant. Cryptos are as much about perception as reality. Take devcoin, it has constant supply but I think it's current rate of generation is exactly the same as bitcoin when adjusted for the /1000 dec move and will be until it reaches the equivalent point in time where btc halved. But that's not what people look at. If there's anything wrong with devcoin it's just the choice of such large numbers - perception - although in practice it's large numbers that could facilitate very widespread project distribution.
Stability comes with an equilibrium of participation, buying and selling. Not by playing about with the parameters, where if bitcoin is the benchmark that's the shadow we'd always be chasing. Regardless I do think it's good to be discussing all this. Devcoin and others make too many assumptions about incentive and interest that should be challenged when improvements can be made.