On point 4, WAR and SAM having their gap closers on a gauge not a CD is actually an advantage, it means that they are used explicitly for their purpose of gap closing and not in coordination with their burst phase. It means that you can use them when theyre needed instead, and when using them when needed they are not or are a very minor dps loss at the cost of the utility of the skill. If they were on 2 charges you'd have to save both charges for IR, which can catch you with your trousers down, and there's also nothing more annoying than the dps loss of having to save a gap closer for outside your burst for a mechanic, (which is a similarly small loss to using your gauge).