I think Schmidt has had plenty of showings to try and understand this Lions team and in particular their defensive approach and line speed.
My take is that there's two real ways to address it:
I think Beauden Barrett would have a field day grubbering through or chipping over the top, his vision and his touch off the boot with a chasing Will Jordan would really exploit it and keep them honest, not sure Donaldson/Lynagh/JOC (James O'Connor) have that in them however, but something to think about. You definitely would have to front foot it though, if you stand flat and go for it - no good.
The Wallabies NEED to adapt to the way the referee handles the line speed. If the referee lets the Lions set the line speed then you NEED to match as a unit. As someone pointed out, what makes it work for them is that they're all aligned, the refs see 5 guys up quick - what are the chances 5 of them would be offside? The ref sees one guy shoot far quicker than the rest of his team? Much easier call.
I do think this whole flick around the back and try exploit out wide is nice in principle, but you need some big units to just take some dirty carries in the middle to keep them honest first. That's what the Lions have done well too. My hope is that Bobby V, McReight, Wilson, Skelton, Williams, 7As (Allan Ala'alatoa) etc. can do a job here.
Despite my disappointments from this weekend, I'm still an optimistic and I'll always believe in the men in gold. Once again, Australian/South African Brits never, Tongan Wallabies forever. Les goh.