Sorry if I sounded like trolling, I didn't meant to offend you, usually it's not my style.
I'm curious to see the implementation of your vision.
Just wasn't clear how you can accomplish to goal of this coin. It sounds like you are trying to introduce another factor to limit the block rate which originally the difficulty re-targeting was designed for. The question is how you'll be able to decide which node will get less or more coins, if it's not based on hash rate. Each node can submit a limited number of block? In this case one can install hundreds of nodes load balancing a big ASIC miner between them. It's true that it's harder but the network still can be exploited by powerful miners.
Sorry you too, not simple in this jungle to understand who want to troll only and who ask serious questions.
No it's not node limits. At first many big Asics (standalone version) don't work in getwork. They work only on stratum protocol. This Asics will not able to mine SevenCoin. Another limit it's with the timewall. No blocks will be accepted before timespan. It means that all nodes have time for sync correctly, malicious people cannot fork the network and it give the opportunity to slow ASICs to find a block. The diff fixed at 1 guarantees only that this last word will true.