LRP is terrible for the game in my opinion and should be moderated. The game is moving towards a Call of Duty style gameplay where marines chase exenos and talk shit in DCHAT after they die or kill something.
I think one of the main issues regarding LRP is the way marines execute orders, I see many times where Delta is ordered to secure South of Bar in Solaris for example but they instead breach ETA and UNGA as they say, into the enemy lines. There is no logical reason for this and is just looking for frags as most EPIC GAMERs both here in the forums and in the game will tell you in CM these days.
There is no logical reason for marines to disobey command orders unless there is a strong RP or situational reason and should be considered LRP In my opinion. I do not enjoy LRP and do think it is unhealthy for the game in the long term this is only my opinion, however.
I do believe RP should be encouraged and rewarded, the goal of CM should not be to kill exenos and end the round as fast as possible.