We did not allow aircraft too many aircraft coming to our FIR each time we tried the new system. The handling is marginal, but how long we can rely on this ridiculous flow control for inbound traffic?! The new system is a crap, it is absolute design for aesd engineer not for controller. the engineering chief bought this rubbish with cancer as punishment and retired years ago, what karma would his boss receive? more promotion? if passenger died because of this rubbish, you guys will also have omen on you.