I'm humbled you were willing to write so much out! Thank you!!!
Both options definitely have their pros and cons. I kinda sprung this game jam on my wife so I didn't want to ask for too much art but the in-between forms are definitely something I'd like to do if both of us can find the time.
The ratio idea is also pretty compelling but as you said, quite a huge overhaul - perhaps an idea for another game!
There is an indicator for the next Mutation but it's definitely not very clear - this is something I'm gonna be working on. Thanks again!