ASW – Alternative hero leveling.

I don't like writing a lot, but there's nothing I can do about it: until I explain to someone why I acted this way, they will consider it wrong.

Any changes must be justified. And how did you expect it to be?
If I see reasonable justifications, even if they can be criticized, then it's not necessarily required.

Regarding the topic, the meaning of the phrase

It was illogical not to give the native magic as a summoning spell, but to give it easy shield acquisition.

escapes me (double "not"). Am I translating it correctly: "It would be logical to give the native summoning magic, but it is illogical to give it easy shield acquisition"?
And the second question, does changing the native magic schools (for example, from Air to Summoning, or from Summoning to Darkness) fall within the project's plans? Does the project plan include rearranging the chances of acquiring one or another skill?