Haha, certainly never too late. Especially given the speed at which my own work on this game is going.
Yes! In combat if you’re actively getting your illusory images involved you’re going to run out of them pretty quickly (say, you get two rounds of “automatically” dodging attacks). However, in my own games I’ve had players get quite a bit of non-combat utility out of them, and combat in Brighter Worlds is usually not going to last considerably longer than a couple rounds so that’s really all you need. And honestly, the trope of the illusionist running out of tricks and getting cornered is funny to me even when it’s happening to a player, maybe especially in that case.