Is this not something developers should sort out? This is an element of centralisation when pools can dictate their own rules on the rest of the network. A truly decentralise bitcoin should by default be the codes that process the rules and protocols.
No. You cannot dictate what transactions are included at all, only what rules they must abide by. To do so would require a hard fork and mandating what transactions will be going in would be an extremely unpopular move and suicide for a cryptocurrency that is trying to be open.