Bitcoin was created to break third party, if you're saying third party will make it more secure and trust, this clearly kill the decentralization of Bitcoin.

Sure there will be something new to attract audience and the competition will be tougher, but I don't think it's a pros because we as a holder isn't owning that centralized exchange, regardless they're making profit or not, there's no impact.

I disagree, the fees will be cheaper because the exchange can consolidate many inputs and outputs in single transaction.