1) We don't have a clear consensus building process. We need to decide if we want 75% consensus within 1000 blocks by the miners followed by 95% consensus within 1000 Blocks, or if we just want 80% consensus within 5000 blocks. We need a clear process.
>75% of miners willing to accept the change simply lets devs know it's safe to implement.
dev's should reach consensus and use miner votes and BTC votes to help them reach consensus, would gavin had created bitcoinXT had he known <1% of miners would support it, while >60% support BIP100. i don't think he would of wasted his time. maybe he would of changed his mind and created a new BIP, but that's too late now, poor gavin cast away, forever?