From the first impression of Hubski that I have, I feel like the trolls won't be comfortable in this environment. To me it feels like a more personal and "slower" (let me explain!) community. They will probably flock to voat which is already a pretty close clone of reddit (look at all the subvoats, the Top20 match reddits).
By slower I mean it's more personal and the contents of posts(?) is longer and more thought out. Most of the time even more personal. I have never read "I always like your posts xxx" or "good to see you here xxx" on reddit, except in the really small communities. Hubski might just be the aggregator that I was missing in the last years, when reddit's r/all was going downhill. I'll still have my small communities, but that's more like a forum/mailing-list than to find new interests.
Also, this September might not last that long ;)