Exploration & discovery gameplay has had loads of new stuff with Odyssey, new planets to land on, new things to find & new ways to find them that are more involved than simply telling you it's exact location. It has become a skill/experience based playstyle once again, where the player can feel some sense of achievement from getting better at searching for patterns (likely looking terrain in this case).
The 'heatmap could be improved & bugs aside had more useful functionality (for bio signs at least) in the Alpha. To say that explorers have been ignored because of shortfalls or bugs in the heatmap, and because mats can no longer be so easily farmed seems churlish under the circumstances. The primary activities of exploring (looking for interesting things) and discovery (being able to actually find those things) is in a much better, more challenging place than it has been for the past couple of years (since the 3.3 update).
There is a lot to like here, more than just the codex box ticking, and much more than just a place to farm mats. It is possible to fail once more.
I'm sure some new, even faster way to farm mats will be discovered eventually