Where they are healthy is in morning programming ('Studio 10' has built an audience from nothing, and with no lead in, to beat Nine's 'Today Extra' on occasions). Their early evening doesn't set the world on fire, but if you look at demos, their key hour of 'The Project' from 6.30 to 7.30 does very well, and that show is something that is always talked about as likely being copied by other networks (because it attracts exactly the right type of audience). In fact, they just exported the show to New Zealand, where they make their own version.
In prime time, Ten has some big hits and some mild hits and then a lot of not much. Masterchef, Have You Been Paying Attention and Gogglebox all win their time slots. I'm A Celebrity Get Me Out of Here is not as huge, but it's still a hit.
The strength of those shows - particularly the game show HYBPA and Gogglebox - is that they have Ten stamped all over them.. they are very funny and cheap and irreverent (like a Japanese panel comedy game show) and the show just built and built from such a low base, but Ten stuck with it. And, now, in this era of downloads and streams and TV dying, these topical, funny, news-related comedy shows are proving to be what young people like to watch and Tweet about at the same time. So there is still hope for Ten.
As for news, Ten is not in the same league as Seven and Nine, but, in reality, it abdicated this responsibility when it took its news to 5PM in 1992. For now, Eyewitness News is STILL their highest-rating program on many nights (or second-highest after another news program, The Project 7PM). The dilemma for Ten is if they cut their news operation further, they risk a massive drop in their 5-6PM audience. For example, a networked newscast from SKY (as some have speculated) would be a disaster. They will have to come up with a very good plan to both save money and keep their news strong in the early evening.
Here is an example of 'Studio 10' changing gears and going into Breaking News mode for daytime coverage of the Manchester Bombing: