Oh and about profitability, the problem is not the small difference in fees depending on the block transactions. I was talking about having most of the pool's hashrate mining only over a BIP-110 chain of blocks (fork) that then get reorged so all those block rewards are gone and the hashrate "wasted". The impact of profitability would be huge in this case. And it's more about what people within the pool decide to do, not even conditional to overall support of BIP-110.
