You're probably right with that. But let's try it one more time.
In Loren 1 you could learn higher level versions of skills you already knew. Those versions were a fixed package. More damage, wider area, more duration and so on.
In Loren 2 you are not restricted by a fixed package. Instead you learn boosts that increase damage or increase the area or give your effects more duration and so on. These boosts can be freely combined to create your own package.
A higher level skills would simply allow you to use more boosts in that package. In addition you don't have to decide on your package in advance. You can change what's in it every time you use the skill.
Even the maximum size of the package can be temporarily increased by spending BP. All that flexibility comes at a price though. Not only do you need to learn these components for your package boosts also come with a condition. Before you can include the boost in your package you need to fulfil the condition.
RPG Programmer for Winterwolves, currently working on: Amber's Magic Shop
Part-time emotionless AI