Curious about this one. I mean, on a per faction basis, the Core set is pretty stark right now and I noticed no expansion is going to be added on the 20th. Will expansions slowly trickle down from extended to Core to bulk it out?
New sets will not be added to the core set. The core set is meant to be like a starter set of the older runes. Only the extended set will expand.
Don't suppose you know if there's been any discussion on purchasing single runes? i.e. Single Random Rune, 260 gold. With lower odds overall than a pack of higher rarities, possibly no chance of a legendary. Single Ironfist Rune, 320 gold. Same odds as the rune above, but lets you collect a specific faction. Those could come from any core or expansion set. I mean, people like micro-transactions. The issue with packs and boxes is they are bigger, less frequent purchases. I would much prefer slowly grabbing new runes each day rather than once every 4-5 days.
