We have quite a few new players in the guild. We are very casual and open to players of any level and have low requirements. We also have an active discord where these and similar issues are quite frequently being asked and considered. We also have some higher level (1000+) players who never got a single mythic from a chest, only crafted. IDK about the majority, but for these players, it kind of works, more or less.
You are thinking about how you can finish a bounty to the final stage or beat a delve to level 500 all the way with a faction team, or some other extreme stuff. Well, TBH, these are not needed to enjoy the game. Quite a lot of casual players simply enjoy the process without having any extreme goals. I don’t remember last time I finished all tiers in a bounty (probably never) and I personally never got to level 500 Raid or even level 144 Invasion. I do get to floor 25 in ToD occasionally, every 3rd time, provided that some kind guild mates post their scouting results. What I want to say that your current status may enhance your aspirations and exacerbate the needs that an advanced/veteran perceives. While for some new players, who like to be challenged but are not overly ambitious, the goal is to find a sneaky way to progress entirely for free. Which is certainly doable and possible even without considerable time investment. None of the mythic are real game changers for these people. With some creativity, almost anything works reasonably well to a certain level.
Initially, I was thinking that expanding the number of cards is a bad thing that will dilute the pool of useful cards to an absurd level. However, developers somehow managed to keep the balance here. You don’t have Ishbaala? Well, there is Infernal king. You don’t have either? There is Sekhma, Forest quradian and 15 other alternative skull converters, etc. etc. Most of the general utility cards are very accessible (rare or ultrarare) still. So, there is nothing that cannot be overcome without some creativity. There are multiple ways to handle even relatively extreme challenges. We got most of the means for free just by playing the game at a reasonable pace, it is rather the issue of correctly applying these free means. I see mythics, some of them, as a simplifying shortcut to certain extreme goals which are completely achievable in an alternative manner and are not even considered by a majority of players.
Finally, IMHO, monetization is the tricky aspect. A lot of people simply don’t have the extra money, which is a reasonable assumption for those who pick up GoW as a f2p title from the store.