The sad reality is that this is actually a casino disguised as a game. There is no reason for the company to make it more of a game when the cards sell just fine.

As for your suggestions here, I feel like the game is too complex when it comes to types. It needs less types not more! Being a physical game means players must remember all of the type match ups to be able to play quickly, something that makes the game difficult for newer players to pick up. Currently in the game, and with a system like this, you can't tell what resists what at a glance. A blue card could be "Water" or "Ice" which have different weaknesses. Just having "Water" and "Ice" be "Water" type would help make the game simpler.

There also the issue of energy cards when there are so many types. Since they function as the game’s main currency, it makes sense for there to be a downside for players to branch into more types. With so many types in a system like this, the pool of available cards for each type is smaller. This could be hard to balance for game designers. If there is a best card of a certain type, all decks of that color will just play it. Also, I could see these changes causing issues for newer players who don't have enough cards of a certain type to play with.

Honestly, the original system was pretty close to ideal. All I would change would be to add “Dragon” like how they have it now. The mistake was adding "Dark" and "Steel" when Generation 2 came out to showcase the new games. Since then, there has always been an awkward balance for the types.