When it comes to planeswalkers in such limited colors youre basically playing the top 20
It really speeds up your stuff and is massive ramp that gets better the longer you drop it, but just four or five on turn 2 or 3 when you drop it is still pretty good
Then if cast from exile you'll also gain twice that power's life - great for saving yourself and then free in Type Four where you have infinite mana but just one spell per turn barring alternate costs like Force of Will or this
Having access to all five colors means you can run Maelstrom Nexus and Yidris, Maelstrom Wielder, making good use of red cards like Rain of Riches and Volcanic Torrent
The 2/1 with a pair of lands is the only mode in which you are not given choices and it is not something you are sad about
We do have cards for the whole crew now though, thanks to the reveal of Avatar Aang in June, but we'll have to wait and see what else Wizards of the Coasts is hiding away for now