Not sure what the freeview model will be like in Australia, here in the UK it's a lot better than regular TV but not a patch on Sky (Foxtel equivalent).
We've got maybe 15 to 20 channels on freeview which includes the 5 free to air channels, there's one music channel, the Sky Sports News channel (which is very useful), an entertainment channel or two plus a few news services. There's certainly no additional sports channels (besides the sports news) so in terms of more coverage for less mainstream sports there is no benefit. However, it looks as though the Australian model may be different with each channel (7, 9, 10 etc) providing a couple of channels. If this is the case then fingers crossed for NBL's return to free to air.