I saw that ratio too...I dont believe players who get a better than 50% HS ratio. Look at most servers and stats and even the best players average about 30-40% so how does he get better than 50%?
I haven't seem him play but I bet I ban him within minutes. The only good thing I can say is that HLG hasnt really warned him excessively so that's good. When I saw that ratio I was expected HLG to throw him some aimwarns but it didn't.
I will reserve judgement though until I see him play.