The entire reason offlane void is a thing and is actually doable is because of how ludicrously strong Chronosphere and Time Lock are. Blink into a fight, drop a Chronosphere, and you can easily pick up multiple kills. With just a Mask of Madness or maybe treads+maelstrom, you can very easily kill people solo inside a Chronosphere.
Which is fine, I like flexibility in hero choices and laning strategies. But Chronosphere's cooldown is way too short for how strong it is, especially if they're going to make Black Hole (much harder to use, much riskier to use) such a long cooldown.