Being a regualr player throughout the day when I can I can tell you this. Numbers have dropped off over the past few months. You will still find a few people playing throughout the day and you can still get a really good game going, inpart due to the much tougher bots on the servers. I find round about 6pm or 7pm you get a full server going. The game is still very much playable and were still racking up the hours. So get back into it.
I tend to come online when I get a chance. Usually, There will be only 1 other person on server, if any.... Who has to be a "runner", running away from my character and then leaving server after I kill him 2/3 times

. Sometimes I see a handful of people on server... for example playing with faro, persus, and some other people. But most of the time its just 1 person, who leaves shortly after I join. This just makes it boring, as then you are against bots for a while who are never as good as a human competition or team mate.