Basically, what I suggest is making a plugin that draws additional independent gauges in battle so the player can keep track of a variable value.
This could be really useful for players to come up with their own unique battle systems.
The gauges could have a name, drawn at specific coordinates and the values of the variable shown could have a floor and a ceiling value.
For example, a gauge could measure up a variable that equals an enemy's "rage" meter (a variable that can be changed through eventing), giving player the opportunity to plan his moves.
Or a gauge could show a skill's damage multiplier that changes through variable with the damage formula and there is no other way for the player to check.
Maybe a gauge that shows how many turns are left until an enemy attack is launched, etc.
I don't know if this is rather complicated because I, unfortunately, lack the necessary coding skills to even try.
Thanks in advance!