If SH5 is the game you want to play, then yes it is worth it and has been for a couple of years at least. The main bugs are ironed out and there are some great adventures to be had.
If it's not, then no, it's not worth it and never will be. The differences in gameplay between SH5 and its predecessors is immense.
The answers are out there.
http://www.subsim.com/radioroom/show...orth+it+yet%3F
http://www.subsim.com/radioroom/show...=worth+playing
http://www.subsim.com/radioroom/show...orth+it+yet%3F