Why at any given time, I only see one maybe two orcs online...Also, what was the reason why orcs were taken out of cabals?

...it's not that fun to be an orc. Having had a few hero orcs, the amount of damage you can output is fun and yes you can be somewhat viable in most pk situations (lots of prepping required) but in a nut shell, you're in a 1man cabal. Some people like it, others do not.

If they were allowed in cabals or if they had an item that gave powers then it would at least be somewhat entertaining but generally it's boring as hell at hero. Exploring with them can be nice because of the massive damage output but it can also backfire in harder places like the Inferno where your wimpy and lack of defense can be a downside.

It's not that they aren't capable in pk situations...it's just not really fun to play them. Maybe someone should Santa Zulg an orc cabal item that gave powers so they at least have a role inside the cabal fights. Or let them go back to joining cabals...