Then we have the way it works now, 'Enhanced', where any form with a weight above a certain value can be selected manually, forms with a value below that can be received from 'random'.
Then there's 'Standard'. This is the way it worked before I came around. Given that part of my goal was keeping AJFluffys original vision around, this was inevitable. Lesser dragon types can be manually chosen if they have a weight above a given value, the 'higher' (fancier) dragon types can only be recieved off random, regardless of weight.
Finally, there's 'Unrestricted'. In this mode, ANY form is directly selectable to ANY class. It's primarily for testing and unsupported addons (though I plan to continue add support for addons manually so other modes can use them), and it is not balanced AT ALL. I don't recommend playing on this for general purposes, some forms might be buggy off there normal classes. (There aren't many, but a few might be.)
ToDo:
Add talent icons for Sky Dragon's talents, and talent icons for Temporal Dragon's talents.
Find more appropriate coloration and icon forms for both Sky and Temporal forms.
Create Spiny Draconian.
Buff mastery on Zen (meant to do this last time, forgot.)
Special something coming when Tome 1.1.6 comes out, wait and see

Continue to add support for more addon classes. Chime in here for the ones you want folks.