Penalty for larger coin holders? Have you ask your self how this will help this coin? [...] Plan and simple POS will do just fine.
You are aware that on a plain & simple PoS, with "few" staking wallets, a large coin holders that stakes once in a while can put the network at risk of major forks? And especially so when staking from a home PC/laptop with poor connectivity (such as on a wifi).
There are a couple chains I host an explorer for that fork regularly because of that.
BTW I recently added Orphan blocks statistics to my explorers, find them in the network tab.
I like [1] however not sure if PoS + PoW would be suitable for us. We have problems with too high inflation right now and pushing towards PoS is going to lower it substantially. IF we choose PoS + PoW route incentive must be provided for people to both stake and mine and this is trickier.
Do you have any PoS + PoW specific parameters in mind?
Nothing specific, the PoW subsidy could be kept lower, and have a fast decline.
The idea would be to help stability during the early transition/launch period, to give PoS time.
Eventually, once merge-mining happens, the subsidy can be very low, as it becomes a "free" benefit for pool operators & miners.
Also, a part of me still doubts the intrinsic security of PoS, which can be "gamed", and needs a centralized checkpointing server, but that server becomes a point of failure, and it feels wrong to have decentralized tech rely on a centralized server :/