IMO, more important than catching up to Tesla's headstart in total number of chargers, is just to have reliable station information before you arrive. This doesn't have to work on every network-- just enough of them to trust the system. I won't say it's trivial, but it should be fairly easy to work towards. Each network needs to have a way of exposing charger status, and the vehicles need the software to query them. Again, they don't need to support every single possible charger vendor, but the more the better.
The user won't (usually) care if they are unaware of a few chargers they could have used, but they want data on the ones they plan to use, and they want that data to be accurate.
I've done ~40-50 sessions with them and I never got stranded, but I've had to move the car to the next charger like half the time. Good thing they're putting 4 to 8 stalls at each station.
The good thing is that they appear to be collecting data in real time and seem to have really direct insight into which manufacturers are consistently producing the highest reliability.
In particular, the Mach-E seems to be struggling with low charge rates. However, that review is a press vehicle and was technically preproduction. I have yet to see someone knowledgeable going through the details with an actual customer delivered vehicle.
However, despite those issues, they were still able set the electric cannonball record in the Taycan, beating the previous record (set by the same guys in a Tesla Model 3) by nearly an hour!
That's because the Taycan charges much faster on EA's 350 kW chargers than a Tesla does on a typical Tesla supercharger. (It might be a different story if Tesla had more of the new faster "V3" superchargers, but there are only a few of those on the Cannonball route).
There's still a gap, but its much smaller now and EA is even ahead in some areas.