You have to figure out the feel of each faction I believe one of the big keys to the success of factions is allowing the audience to self-select which faction or factions they want to identify with
Only time will tell, but as Dack Fayden suggests, it only takes fringe eternal play to push a planeswalkers towards the $20 mark (which is the current pre-order price)
Populate is a plus, but if it's just because of that, there's much better stuff
As is so often the case with the best cards, it only costs you 1 red mana, perfect start
Cards With Plot Costs Equal to Their Casting Costs Cards wtih plot costs equal to their casting cost offer a more interesting puzzle
Deciding How Many Boxes to Buy One booster box can give you a good variety of cards from a set, making it a great option if you're playing casually or just starting to compete