Summary Stunt Double is a better version of Clone with flash, allowing for reactive copying of creatures and versatile gameplay options
With the prevalence of white token-based strategies in Standard right now, and how popular they always are in Commander, I think its very unlikely that this wont find a home immediately
Furthermore, simply telling players to ignore that until your next turn is much, much more intuitive than explaining the vagaries of flickering, and there are very few situations where phasing effects need any more thought than that
The Furnace Host saw no need for such caution
A small tangent suggests these cards were being signed as early as 2025, and that they can only use characters whose actor was alive to physically sign the card
Collectors and investors now ask what cards to buy now because the Pokmon card market trends favour scarcity and condition