I have played about 500 hours of multi-player so far.
The good news is that there are fewer bugs than far cry 3, but that is about it.
There are two main points that makes multi-player average quality at best, and fairly boring.
1. The games are way too short. Out of many sessions I have played it is very difficult to get full immersion in a game. Just as things start to warm up the game ends.
Games need to be at least 15 minutes longer.
2. Not enough players per team.
You need to think that out of the 5 players on each team, some are not playing. They are either fiddling around with their load outs, etc..
This game would be much better with 8~10 players on either side. To make matters worse the bell towers are located far from the objectives, which makes game "action packed" play in one area very nearly impossible.