There are plenty of other low-cost cards which can replace Wooded Foothills in this example, not just other lands like Krosan Verge (obviously better if youre also playing white), but spells like Natures Lore or creatures like Wood Elves
On the other hand Sethron, Hurloon General does not care about discard at all, but with the Minotaur token generation, having more attacking Minotaurs, buffing them and giving them evasion (with menace) and haste, can serve better a main aggro strategy where discard and menace are subthemes
The green ramp deck is one of those archetypes that has been around for as long as Magic has existed, and the deck still exists today
An example of the feature mode in previous games would be the Planechase and Archenemy game modes, although neither of these will be in the 2015 addition instead, players are being treated to a fully customisable deck creator, but Ill come back to that shortly