I noticed that the location of the voice instruction you hear before a freeway exit varies based on how fast you're going.
Around 100 km/h, you get the voice instruction 1.5 kilometres before your exit.
Around 80 km/h, you get the voice warning about 1 km before the exit.
Around 60 km/h, you get the warning just 300 metres before the exit.

It's the last one that I think is a problem. Some drivers rely mostly on the voice instructions either because we don't have a phone stand or because of restrictive laws regarding phone use while driving. And if you're on a freeway that has, say, 5 or more lanes, then regardless of what speed you're going at, 300 metres of warning before the exit simply isn't enough. The driver might suddenly have to dart across 5 or more lanes in 300 metres just to make their exit, and that's far too dangerous.

Even at lower speeds, especially for roads with many lanes, such as freeways, Waze voice instructions should give greater warning before the next turn or exit - e.g. 1 or 1.5 km in advance, like we already get at higher speeds.