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)
Stitchwing Skaab and Geralfs Masterpiece get a discount from being played out of the graveyard anyway and provide more ways to fuel Prized Amalgam
You can decide to put it into your hand if you'd rather not play it or if it has a comes-into-play effect that requires it to be played from your hand
Loading Shonen TCG General Disney Lorcana Attack of the Vine best decks for Set 13 launch
In Standard, the Wildgrowth Walker + Jadelight Ranger curve was real, leaving you with a 3/5 and 6 life on top
Limited drifted to the two extremes