But do you mean for Earning Stake Time to be programmatically made non-spendable? That would also require a change in the current functionality, not only a change in what Stats are being displayed and how they are being displayed.
I wasn't aware that coins earning stake time were programmatically spendable, I thought they were considered as part of the staked count currently.
My thoughts are a coin should only ever be in one of three stages - resting (Spendable), working (Earning stake time and/or staking) or awaiting confirmation before being put back into a working state (Interest and Unconfirmed).