Array modifier using collections and curve modifier vithout distortion on seperate topology

There was a talk recently about booleans using collections, array modifier could benefit from it too actually. I tried to use it in creation of various foliage, the idea was to have different leaves going and rotating along the spline, but then I'd had to use multiple arrays with different empties’s angles to create an illusion of randomness.

Is it possible to make an option for the curve modifier so it could treat seperate mesh topology as different objects with their own origin? When modeling objects with curve modifier like hanging bridges, or railways, or even foliage and trying to keep things procedural you have to go for compomise - editability at the cost of distorion.