The thing I have always thought, along with the very tight min fuel stuff is that fighting against it or doing the workaround doesn't actually cure the problem.
I have always thought that by doing what they say then doing the divert/GA will hit them in the wallet and get things changed much faster than fighting and moaning all the time.
I did that with one route which was stupid low min fuel and diverted twice early and 2 days later the fuel was bumped up by 5% (which is what everyone was doing anyway) and the traffic load was reduced to mucho bitching of commercial.