Planet landing just for the sake of be able to land on a planet is imo pretty useless feature if there is nothing to do on the planet.
But I guess they will implent mining station like they did in first encounter then we have atleast one purpose of planet landing, and I also want to have animal and flora to scan to be able to sell and perhaps some alien artifact, lost human colony, failed colony atempt, pirate cash, ship wrecks you can scan and loot and perhaps find modules that you can fit to your ship.
If all those things are implented then planetary landing will have a purpose.