I'm not disagreeing with you on LuaLua generally, I just think you are being harsh in this situation. Except for an amazing start to this season, he has largely flattered to deceive in the Championship with a couple of good games followed by a few quieter ones.
However, in regard to him going...
Absolutely. Still think it was just outside but it's still not clear after replays so it must be impossible for a referee/linesman. Hard to feel too much sympathy for the defender as LuaLua was breaking into the box and, if he got past the defender, would have had a good chance to cross/shoot.
I think you're being very harsh on LuaLua. I'm not his biggest fan but, at that point, he was in the best form he's ever been for us. As said above, the defender totally cleaned him out and there's no way he could have played for that