(You'll also still be able to change this on a deck-by-deck basis, such as if you want In Addition to All the Incredible Gameplay We recently started what we like to call MTG Arena Dev Chats, where we write up articles (such as this article), post onto Reddit threads (like this), or even tell stories across our social media channels (like Twitter)
The pseudo-anthem that Jirina provides while on the battlefield is the best kind of boon we can expect from a Commander for a deck whose game plan is to go as wide as possible
They cast it without paying its mana cost or put it into their hand
The creature types on a plane do a lot to establish the planes lore and the creatures' relationship to it
Of course thats part and parcel of this game: you play with cards you already know, all in order to collect the Legendary Cards no one has seen before
Or, if you want to keep up with the current TCG, we're always happy to chat about decks in the Wargamer Discord.