The simple fact is that on the advice of core developers activation was changed to using WP APIs instead of my own implementation. That means that since this is a caching plugin and has to modify files on your server *unlike most plugins*, that if *anything* goes wrong you will have a negative experience. Despite the fact that there were no public releases, our enterprise clients were the focus of last year, which is what funded the 150+ features that were added. All of those customers and paid support customers are running fine, it's the implementation of changes to writing to the disk and releasing to those into the wild that caused the majority of complaints.
In addition, MaxCDN.com one of the best CDN providers available also changed their API at the same time.
I'm sorry, making software that *intends* gives you all the same advantages as what large corporations have for free is a very challenging task. Thanks for trying W3TC anyway.