Why don't you just lower the required confirmations for staked coins from 110 to 10? The only problem I can see is that the blockchain is moving very slowly. It's not that the wallets are not syncing...they're just showing they're not synced because it's been so long since a block has been generated. If you can get people's staked coins to confirm quicker they'll be able to restake quicker and generate PoS blocks on a more regular basis. I think the problem is much simpler than it's being made out to be.
There must be some good reason for to keep such high confirmations. Right?
Only if the blockchain is moving as it's supposed to be and you want confirmations to take 110 minutes. But the blockchain isn't moving. I personally have four PoS blocks that I'm waiting on to confirm that have 20, 12, 11, and 10 confirmations. If maturity was lowered to 10 blocks all of those coins would once again be staking and generating new blocks, and that's just my wallet which has less than 1000 coins.
Thats not even in the ballpark of whats wrong here. Blockchain isn't moving because no one is opening their wallets because their wallets won't stay synced. Ok, watch, I'm gonna open my wallet after I redownload the blockchain again. All my coins will want to stake immediately, and I'll be off on my own chain within a couple hours.
Dynamic stake interest is cool, but if that is the issue right now just take it out and release a working wallet with flat interest for now. It can be changed back later when it works right. I don't understand what is so hard here.