Really, I've overlooked the blocks. Thank, I'll dig into it and give feedback.

I know that Dark's pool is not yours, but you've written you are in contact with him. Don't you think net hashrate is going down because many miners are bad-tempered?
And yes, most orphaned blocks are blockchain related, but I think it's a combination of short block time and long sync time.

I don't think a coin will die because maintainer is not reachable for 3 days. Keep cool and wait some more days.