I am a miner. So it is good for the ETC or ETH to remove the difficulty time bomb. Any one does it first will get miners support.
The miners will just mine the most profitable coin. So if the price of ETH is high and even though ETC changes first, miners will mine ETH.
If the ETC keeps on being an PoW coin, I think the price can be higher as it has the support of the miners' community.
I hope that ETC stays PoW. ETC needs to differentiate enough from ETH to deliver a product that is different enough to justify its existence. Sure immutability is a key principle, but PoW would add the project another reason to exist and can be a safe haven in case ETH fucks up real bad when they go PoS which is a serious possibility. In that case anyone holding ETC will go to the moon.