~Regarding post Big Bang Sharp Eyes~

How does Sharp Eyes function post Big bang? Does it still overpower certain "critical" classes such as NLs and Arans? Did they bring some sort of balance to this combination of skills?

It increase Critmax and Critchance, while thorns affects Critmin.

Sharp Eyes now pretty much powers up all classes equally, maybe a little more to crit classes. It's pretty nice.

does that mean that thorns and se can be used together? or is there still restrictions on thorns?

Sharp Eyes and Thorns both increase damage for all classes by about 10-15% (not strictly in this range). Sharp Eyes is slightly better for classes that already have some +min crit damage, like Corsairs and Buccs.