I understand your folks frustrations, as I have been, still am, and probably will be, in the same boat. You have to really prioritize and choose your battles, your strategies,and your countermeasures. However most importantly though is knowing when to step out, this process is very consuming, the process takes a lot out of you. Anyone on this forum can attest to that fact. I am not discouraging anyone from fighting for what they are rightfully entitled to by no means, however, be careful not to let the process define and erode the strong caring individual that you are. If you let that happen, what have you gained, even more importantly what have you lost?
Frankly I am guilty of this myself, I'm stubborn and I like the fight. Something about truth and justice those are examples of terms come to mind. Sometimes in the fight I have become so engrossed and invested in it, that I loose bearing on what is really important, things like friends, family, loved ones, enjoying the life that I still have and realizing what I have left can and should be fulfilling.
I thought I should share this. For the topic, yes I agree with the advice on to counter the BS the VA comp side has pulled. An IMO can surely rectify this. However, you have to base your offensive attack on the weaknesses of the examiners conclusions. Your evidence and IMO will do the job nicely. Your attack will be based on the statements used in the C&P exam itself. You need that in order to succeed. Until you have this information, relax, breathe, and get your bearings. Service connection was the goal. You got this. Piece of cake, do it by the numbers and press on.
I will go now, but please consider the above. JMO