When you have the option of using a sub, you should employ it fully. Didnt understand why he had to bat under those circumstances. He wasnt even swinging to get the win.
Dont understand what you are talking about regards to KLR. As a captain, he should be able to put his foot down and demand the sub he wants. He seems mature enough that he would understand his participation in the WTC and CWC will be dependent upon his fitness. If he is that dumb, perhaps he isnt the right person.
As for Gambhir coaching/mentoring, I dont see any harm. I also dont like the fact that you seem to be single handedly pointing him out for LSG's failures. In reality, questions ought to be fired at Andy Flower, which no one seems to be doing. Gambhir being seen as an easy target?
If you are referring to international cricket, yes! Domestic cricket/ IPL has never seen bans handed out to players.