Glancing through top 100 in arena only 4-5 players have at least one maxed out tree. Those are the same players that have multiple maxed out decks, which means unless you are dropping significant amounts of cash on chest you will not finish a single tree of this season… I would advise to reconsider this design, because it doesn’t work well for the longevity of the game and alienates 99% of your players.
With the cards being so powerful, and limited, this increases the gap (SIGNIFICANTLY) between your free to play and paying players, which frustrates and decreases the population will of both in the long term.
Games that are successful in season design, rewards, and balance (Apex Legends for eg) has a season goal that is achievable by 80% of the players that purchases their battle pass, providing they invest the time to play and unlock them.
The average player should at least have been able to finish one faction tree here…