My experience with the LEGAD and POLAD in the earliest days of AFG was nothing but positive. It was very clear that they were part of the team, understood the military needs very well and were there both to keep the commanders and the fighters out of potential trouble as well as helping with what they could do.
Remember, they are advisors and the Commander does not HAVE to follow their advice if they see an overriding military need. If such a situation arose, the two advisors could, occasionally, offer further sound advice.
I take the point about the politicization of mil ops, but that's more to do with the politicians and the various higher courts more than the advisors or MoD lawyers. IMHO.