Well maybe some of the information came to the USSR via Pollard. But some of the Hersh article's insinuations seemed a stretch to me. That Afghan arms dealing allegation seems quite a stretch NOT to make up.
I do not believe that Pollard's treason revealed agents in the Soviet Union. Simply beause he was not involved in that kind of work. That is a canard - possibly started by Ames.
I do not know if any of his information enventually reached USSR. However, that's the problem spying for a friendly nation - once the person let go of the information it is no longer his to control - and it could end up in worse places than intended. That if nothing else is Pollard's guilt.
I agree that many things in Hersh's article seemed quite hard to believe - but then a lot of what he writes seems to be a mixture of fiction and self evident truths, made up into great revelations.
Finally, as you wrote in an earlier post, it seemed like Pollard had mental problems. The same with Ames, and Burgess and many other spies. Strange that so many manage to get away with their strange behaviour for so long.