I think too many fans forget that, due to their fantastically high salaries, players are people too who have to overcome the real life obstacles that we all do - emotions, family life & problems, home sickness, adjusting to a different culture, dealing with Scotland's driech weather, etc. Maybe Boli hasn't settled down yet or maybe he really is just shite as many fans think.
It is a bit of a shame that Boli is clearly better suited to a further forward wing back position but he was exclusively played as full back in a 4-5-1 formation, which could at times highlight his defensive inadequacies. Yet when we made the very successful transition to a 3-5-2, which he is much better suited to, we mostly played Greg Taylor who is probably most suited to a 4 at the back.
Personally I don't think we've yet gotten the best out of Boli and I would be starting Taylor too, or possibly try to snap up Hickey as a bargain buy from cash-strapped Hearts (but again he is young and will still make errors as he learns the game). If we get a good enough offer then we probably will cash in on him, but if not then I wouldn't write him off just yet.