I have been playing since I got Broadband (about 6 or so months), and I've loved every minute of it.
I play pretty much every day, for maybe a couple of hours or more. It's loads of fun, once you get into it. It's not a pick up and play blaster, you need to spend time getting to know it, and that I think is why many people don't play.
It takes too much time for some, so they get turned off.
My clan has bad 4 matches in the last 10 days or so, and another one that was cancelled, all about 8 vs 8.
There are players, usually there are 2 servers populated at most times, and none have bots on, because RO bots don't work.
You can usually get a game, but it can be difficult (empty servers suck, you need a fair few players for a game to be any good).
If people stick around it can be fine, but it's quite frustrating at first, and can be frustrating at other times too. But it's fun, especially if you get killed by a guy loads of times, and then you finally spot him, and sneak behind him to stab him in the ass with your bayonet 😀
I love it.