Being from a PHP/MySql background for the past 10+ years and just have moved a site from being custom coded to Oxwall - I too find the documentation and the skeleton not even worth it when trying to make a plugin, and thats just for a simple plugin.
For instance, I have been looking around for the past 4 days on how to write a simple plugin to show some rows from a table. In php it would take me around 5 mins to write all the code and have it online, Oxwall - well Im starting to regret it and alot of others are too. Its the worst documentation I have seen - I have seen worst products that oxwall have outstanding documentation.
In the crash course all you show is a couple of lines like "we will then add this in this file" and then a block of code... Ok, what does the block of code do, or even better what does each line do or reference!/ Changing from one file to another trying to see where things match up - its practically costing money and a headache and customers are getting a little annoyed that they can not see their data.
Part of a successfull product is 1) the support and 2) the documentation.
It sounds like even tho you are listening to users, you are not interested in having more people make plugins which in turn will expand oxwall.
If someone asks me if they recommend a system, I sure won't be suggestion oxwall not one bit.