It would be another reason to use existing TFs. My main goal for the foreseeable future is to expand the range of TFs to include more themes and species. There was a plan to allow slimes to interbreed to create color variants and since the original blue slime was red, it would have been a pink variant. But I didn't exactly finish all content I wanted even by now. I don't think that is coming back anytime soon, but it is on the table.
There's also an idea to make recolors, or to be precise, change species, all sprites and thought bubbles, but retain mechanics. I worked on this already and something fun is coming :) Probably will be posted on FA and later included in the major update.
Viewing post in Aftershift: the Post-TF game comments
It will take significant amount of time. Months, not weeks. Setting an arbitrary deadline could possibly mean rushing content and that would leave everyone unhappy. Progress on the update will be communicated in the same manner as before the demo's release, via Furaffnity. I plan the first post about it next Friday, hopefully I will finish and implement animation by then.