It removes the deckbuilding barrier entirely while still giving you a real Magic experience
I could also see Sarkhan being the key piece of a R/B Control deck which is the kind of deck that always looks better on paper than how it performs because of the variance in its draw steps and lack of velocity to filter through the deck, the exact problem Sarkhan can solve
This flexibility lets you remove problematic planeswalkers while still dealing damage to other opponents directly.
Mondrak, Glory Dominus Like Elesh Norn, this card will be wild in commander-based formats, but even in competitive 1v1, its a force of nature
It can sometimes be worthwhile playing a Siege, even if you don't plan to invest time defeating it, because all Sieges have some sort of effect when first cast as well
Although it means that some players' favorite moments might have been left out, it ensures that the moments that were included are universally recognizable