not unsafe
I dont think that the 737 NG is unsafe , the problems with the elivators all stem from the fact that the controls can go into a true manual reversion and work if the aircraft has a FULL electrical faiure , this is something that the airbus cant do ( yes I know that this is extreamly unlikely).
Boeings do have a fix for these problems but it will take time to get the aircraft into the sheds to have the work done and Boeing are taking a very cautious aproach on these problems.
Both Boeing and Airbus make very safe aircraft and to put the risks of flying into perspective I am going to to do something statisticly far more risky when I finnish this post .........make a cup of tea !.