Here are my two cents. I have spent hours upon hours working with, and playing support on the forums for this plugin.

W3TC got to big and there are way too many people who shouldn't use this plugin. W3TC was not meant for every average joe to use on their blog. That is more in the realm of WordPress Super Cache and there is a sharp learning curve with the plugin.

Then we get people who write various blog posts regarding the plugin but they all recommend different configurations and the vast majority of them have no clue what they are talking about. This makes the support forums filled with questions that have become repetitive and shows that most people simply shouldn't be using this plugin.

You will see average blogs trying to setup varnish, object, database, and every kind of caching module they can think of and while this is great on pen and paper it's an utter waste in practice. The performance drop off for readers when you are using Disk Enhanced vs (all of the APC, Varnish, etc caching modules) is very minimal. You almost will see no increase but because it's in the plugin users have developed the mentality that they need it.

This plugin was marketed as the perfect caching module for every WordPress website and it thus overloaded his work. This plugin isn't meant for those who don't know what they are doing. If you are running a basic blog you don't need all of the caching modules it offers, you would be better off with WordPress Super Cache.

However, if you are using BuddyPress, bbPress, WooCommerce, etc in your website you will need to make use of the other caching modules.

TO Frederick.
If what you say is true at least open the GitHub repository and let us see how these changes are coming along. I know there are plenty of us willing to test it. I know I would but there needs to be some kind of evidence at this point for us to actually believe in what you're saying since you have taken the money of many customers who have never received any support/configuration from your team.