I see two cons of this coin:
1- So, I saw the payout is linear with difficulty. Current payout is 109 per block and difficulty is around 10.
So, even if difficulty goes to 1000 which I think takes more than 2 months, the payout will go to around 10,000 which is still very low considering the 250B coins. This will disappoint miners and they will move away and therefore difficulty will stuck and so will payout.
2- Since the payout increases with difficulty, people on exchange sites do not have enough motivation to buy and hold coins because they scare the price will drop because of incoming more coins. I can say the price will be reduced over time rather than increase.
Dev, could you comment on these ?