Cool ideas and concise!

New classes are always welcome!

I like the flexibility of the Channeler, this can be fun for some players that want to customize well their magic character.

Not bad! It's always good to have classes like this available for player use. Because it's pretty open-ended, someone can really mold these classes into something very unique. 

Concise and straight to the point. Both classes seem balanced and usable. Personally, I wouldn't be overly excited to play either as they feel like a transliteration of the core concepts of the Sorcerer and Druid respectively from 5e rather than standing apart, but they certainly achieve the feel of each. The titles also seem a little awkward or escalate unpredictability.

I liked the magical classes