The Possibility of Saving In-Progress Customs...
As a member slaving over the task of (attempting) to create the ultimate dog, via Custom Tool, I know first hand the frustrations put in place by the inability to save your work. It is a time-consuming (and many times impossible) process.
If a feature was implemented that allowed the use of a limited amount of slots (five, perhaps?) to save your progress, it would greatly relieve much of stated impediments.
I have witnessed it's amount of use on a handful of other websites in the past, and all were fond of it.
There are many players who do not have the funds set aside to create, yet they have worked on their customs. The test of time proves a hassle... will their dogs come out as originally planned? Short of taking a photo of their attributes-- no.
If more indepth detail is needed, you need only request. I am but a message (or a post) away.
-Artex