The 4/2 Plant tokens address a common problem with ramp cards, that they make you pass the turns where you cast them, giving Regrowth a leg-up on the competition
Gardevoir ex and Dragapult ex often need several turns to set up, which is not an issue because they can hide behind powerful control cards like Budew while they slowly evolve into their Stage 2 Pokmon
The best of the bunch even have energy-manipulating abilities for increased viability
Not the fastest path to master set completion
MTG: Arena does a really great job of not only making itself accessible by having a really great tutorial sequence and giving you a great starting collection for free, but it has an amazing setup for earning rewards and giving you reason to explore every inch of the games different formats and styles of play including most notably competitive play
Ashiok wants lots of cards in exile to fuel its ultimate ability, and with draft decks being merely 40 cards, defeating the opponent with mill can be surprisingly easy