The Time Spiral block had a time theme, with the three sets representing the past, present (okay, alternative-reality present), and future
It's delicious no matter how it's served
The key difference is that they lack basic land types (a relevant change for any format with Fetch lands), and that they enter the battlefield tapped unless you control two or more of any other land, not just basic lands, but they are also only be available in allied color pairs
As much as it's going to be a major advantage that full copies of Swords to PlowsharesSwords to Plowshares probably ends with someone having an insane life total, it's nothing compared to the eight lands full copies of Path would result in
4 Thalia's Lieutenant Humans are one of the most popular white creature types, if not the flagship white creature type