It would be worth the cost if the goal were to make Magic Arena the most realistic simulation of paper Magic possible, but with the goal being to make Arena the best new and intermediate player experience possible, changing to a chess clock would be a horrible move (although there should be some changes to the timer system, even with the goal of Arena in mind, with the biggest being that the timer should stop during animations that you can't play through)
Lacking the consistency of Modern, this deck would need to play perfectly in order to get those vital Decends
Some want fun pack openings
I also ran into some issues with the timing of the effects of the Ring that were potentially confusing, such as getting a Ring effect that triggers when your Ring-bearer attacks, when you've already attacked
It means theyll feel good coming out of the pack, and they should last more than long enough for most players
White planeswalkers can summon individually weak creatures that are collectively strong as a group such as soldiers, as well as powerful creatures and leaders that can strengthen all of the player's creatures with additional abilities or strength