If I've understood what MaRo has said about MTG design, design space, and Zendikar block, the main reason that tricks like this weren't used for Landfall is because they wanted to leave the Zendikar version as basic as possible for two reasons:1. so that it would be really easy to pick up and learn how to play a landfall deck because you have the least possible number of new things to worry about2. so that cool ideas like ''whenever you play a land, do something more interesting than make your creatures bigger'' can show up the next time they use landfall in a set. Landfall got a pretty good response. Maybe not as good as Cycling-- but did we see landcycling or creaturecycling in the first set that cycling showed up in? Did we get multikicker in the set that kicker first appeared in? Nope.For mechanics like landfall, if you think 'oh they could have done THIS with it, why didn't they?' chances are, they're doing it right now in the Future-Future-Future League, and we'll see it ... (see all)