I cannot understand how can you go with statement like this: you have a new version of Crypt0L0cker every week and multiple of them and so who cares if Avast can't catch them all!
You're out of what it's supposed an Antivirus does: protect for whatever can damage you.
Crypt0L0cker can do big big damages and if you are good with that risk I'm not.
I experienced through a complete set of test using a PC that I have installed for the purpose.
I created a cloning image to restore back whenever Crypt0L0cker won over the Antivirus.
I found Avast, Avira and Panda failed. Bitdefender, Symantec, Nod32, AVG don't.
Tell me why should I go with Avast if it doesn't block a so harmful ransomware. I should be crazy.
Until you experience the same problem, but at that time it would be to late, you can keep pushing for Avast.
If I were an Avast friend I would try to understand why it failed and I would fix it and for sure I will not say you have a new version of Crypt0L0cker every week and multiple of them and so who cares.
I will wait the news Avast fixed it, until that time I changed my Antivirus with one working on that problem.