Nothing lasts forever, does it? I plan to update this game for a few years at least, as long as it keeps being supported by the community. It has a giant scope for sure.
I don't plan on modular designs like that, but some creatures will have different body parts and some of the future designs like the kangaroo pooltoy will come with a male variant, but most creatures will still use null bulges. Now that I am working on the game full time, new TFs probably will end up more complex than the older ones.
Of course I welcome suggestions and there have been a few people sharing your view so it's not landing on deaf ears.