It's not hopeless for Armstrong, but it's definitely complicated:
For the UCI (and sponsors, i.e. public opinion) the reasoned decision by USADA was enough - but they have no strictly defined burden of proof. The CAS could only rule on procedure, and or USADA, ultimately responsible for establishing whether or not Armstrong doped, the evidence was sufficient.
For the CSA case and other civil cases that rest on the question whether or not L.A. doped, or allegations about him doping being true, the burden of proof is different, but it looks like L.A. could well lose them. He will have to make a calculation on how much it will cost him to pay up. Let's not forget that he's not forced to say anything at all if he's accused, i.e. neither admit nor deny the claims.
For potential criminal cases, either for perjury or drugs related offences, the burden of proof would be much higher, and the criteria on what is admissible evidence much stricter. There is a good chance that what's been revealed so far is not enough for a conviction - which makes admitting to doping (and thereby perjury) that much harder.
Hypocritical as it will surely be, I still wished L.A. would own up now - I am sure there are many who would be more than willing to forgive him (but mostly themselves for their naivety) at the first opportunity. L.A.'s window of opportunity in this respect is larger than most's, but it's not infinite.
I also think L.A. needs to get some lawyers whose interests are more aligned with his own.