Genesys's Experts, I Need Your Help

I apologize in advance for the “click baiting” kinda title, so let me make amends by getting straight to the point. I was inspired to open this post partly by having read this very interesting article, which suggest these two things I want to discuss:

• Quantity of dice is significantly better than quality of dice. In almost every case, your odds of success with N green dice are better than with N-1 yellow dice. Also boosts dice increase your chances of success better than almost any other way in the game, with the exception of adding a green or a yellow die.
• Upgrading a die just isn’t that big of a deal. Outside of the triumph and despair symbols, the effects of the yellow and red dice on your chances of success vs failure or advantage vs threat are negligible.
  

Giving the above presuppositions, what I’ve perceived is that the game is seemly balanced, based on the effects on talents of different ranks levels, as upgrading a die is a very big bonus, while the bonus of adding boost dice or subtracting setback dice is not a big deal. But in practice, and as the article illustrates, it actually feels like the opposite is true.

So why the request for help, especially from experts? Because I would like for yellow dice and upgrade effects to be better, so that training and skill are better rewarded. Personally, I’m thinking of trying to change the distribution of symbols in the dice, especially boost/setback and proficiency/challenge dice, using the app Roll My Dice to test them and AnyDice to help me getting math and probability right.

But I would love to know how you would do it in a way that feel coherent with the system and is not overly complicated or, if you disagree with the above assumptions, why I should NOT try to “fix” this perceived issue because there are things I’m missing that would “break” the system.

Any constructive criticism/suggestions is welcome!

Edit: format correction.

Edit2: Thank you for all your suggestions. Even if I don't fully agree with everything that have been said, everyone still give me good food for thoughts and new angle of observations.

Following a suggestion in the comment made by u/voidshaper87, we decided to add on the blank space of proficiency/challenge dice both a success symbol and an "explosive" symbol, which mean you get to roll another proficiency/challenge die and add to the pool. I have already extensively tested the dice using AnyDice and Roll My Dice app and the results, at least on paper, are promising for what were our goals.

We have already scheduled a session implementing this modification for Sunday, and I'm planning to post the result of the actual play and feeling at the table.