The suggestion is that the panel should say, for example, "10/25" to mean "10 builders available, you started with 25".
I'm strongly against this; it doesn't work for NeoLemmix. Firstly, the skill panel buttons only have room for two digits (and no, I know you love your hi-res, but namida has made it clear that NL will never move to hi-res only).
More importantly, information on the number of skills used is a niche feature that's nice to have, but definitely doesn't merit being always-on and taking up screen real estate. The extra numbers would make it much easier to get confused when looking at the number of each skill you have left, which is the really important information you want access to at all times.