sai have more potential or holding back

[Uchicha Macho]

From what i know about sai he kill alot of people for danzo and take there skill or weapon after
We only saw him use the ink jutsu or that drawing jutsu
We have not saw the real him in battle .

What u think about him
Do u think he very skillful in jutsu( nin ,tai and gen)

 

[Narutobi Sensei]

ya he probably have some hidden potential , or he kills people just by sneaking around and killing them in the moment they do not expect it .