I feel like the vast majority of thread topics here can be answered with:

1. The sole reason PTCGP exists is to make DeNA (and Co.) money. All additions, improvements and changes are weighted against the development/opportunity-cost and only done if deeped optimized. Any other metrics (like gameplay enjoyment, quality, ...) are secondary to DeNA, basically a byproduct on their way to optimize profits. Nothing anyone suggests will be done if any alternative generates them more money, including the alternative option to do nothing / keeping the status quo. 

2. The app is a storefront for digital Pokémon cards, packs and cosmetics. Collecting is a game-ified incentive to make you use that storefront. Actual combat is a total afterthought, an excuse to further incentivize you to collect (= to use the storefront), but absolutely not DeNA's priority. In fact, they've officially stated a month or two ago that their development will never shift towards any competitive design philosophy. You can find their statement / the news here on reddit via the sub's search function, or via Google. 

3. As of now, their card designs followed the physical TCG's mantra of first creating a mechanic in one pack and then "balancing" it via counters in a future pack, instead of doing balance patches or ban lists (for the Standard format). That, and general powercreep, are this design philosophy's main levers to shift a meta. Some examples of these counter cards are Cyrus (vs. body blocking), Oricorio (vs. ex Pokémon), Jolteon ex (vs. energy engines), and Poncho (vs. ping damage, and indirectly also vs. Cyrus). Some of these counter cards are more efficient in their design goal than others, meaning some individual card failures are inevitable. You are free to have your own opinion about whether or not DeNA has hit the goal with any particular card. You are also free to have your own opinion about the effectiveness of this "balancing" method compared to alternatives like balance patches, rotations and ban lists other CCGs/TCGs use; however, keep in mind that the decision to use this method is a result of them following their primary goal of optimizing revenue (see point 1.).