This is a brilliant subject to be honest because it invokes some debate.
I dont think true JWs really do grieve properly; there is no sense of finality because they hold fast to this supposed promise of eutopian paradise when they will see their loved ones again and that it wont be long either. I know a friend who lost his wife some years ago whilst a witness and upon his leaving the witnesses, he described what could only be grief for the loss of his wife some 15 years earlier. It was as though the grief had been supressed deep down inside until his day of realisation.
In my view the WTS attempts to control peoples minds so much that the end result is a person whose true feelings are repressed and buried deep down.
In other areas they try to discourage emotion especially when it comes to family members and loved ones; the old 'heart is treacherous' baloney they spout teaches their members to reject their brains emotive signals and bury them deep.
Is ignoring your brain healthy!? Apparently so for JWs!