There is:
1 micro stun (.5 seconds) from his ulti.
1 micro fear (.5 seconds), or 1 blind (2.5 second max) from Q
10% slow from basic attacks (Which can hit 5 people with E), or a every third hit blind (With a every 5th attack doing 65% [max] ad with a 1% [max 6%] of max health burn with E).
1 30% slow, or MR reduction (max of 25 points) from W.
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A low slow. A low MR reduction. Low HP burn. A root. A micro fear. A micro Stun.
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^ Sorry but I don't see this as being OP. Since he has only blinds and a life burn in one mode, and a slow, and a micro fear and stun in the other.
Please explain if you believe otherwise.