Slippery, pigs @rse. The thread started with "is it industrial action or have all the good controllers gone?". Nice way to start a civil conversation.....
What you call "inefficiencies" is the acceptance rate which is set by external factors, including your companies. Go moan at them. They have the power to try to change things.
I have no idea who introduced the extra speed restrictions on the STARs - it certainly wasn't the line controllers as it reduces flexibility for everyone.