I have used OzRunways, AvPlan, and Foreflight. The latter is now my preferred EFB. Foreflight was actually one of the oldest iPad apps ever, actually launching as an app before the iPad was created.
If you've used both Foreflight and OzRunways extensively it's very apparent that Foreflight has features that OzRunways would likely never have had as the market here is just too small.
As an example, Foreflight has two way flight plan sync with the later generation Garmin avionics, as well as displaying ADSB-IN traffic from Garmin avionics on the EFB. That's a massive deal. You can also file flight plans directly to Airservices without opening NAIPs.
I see this acquisition as a positive thing as it allows the hard working team at OzRunways to experience a liquidity event, and Foreflight will take some of the sorta unique Australian things of OzRunways and incorporate the features into Foreflight.