I was really looking forward to the new exploration mechanics.
(...)
I'm disappointed to find that there's pretty much sod all out here to do. I've scanned,
(...)
All the planets are boringly featureless,
(...) or maybe Im being impatient?
Impatient - I wouldn't call it that. Misinformed/misguided? More likely.
If you think about it, exploring systems quickly become repetitive. After just few jumps you can tell you've seen 90% of content. But this is not the case in exploration and changes we got recently. You see, previous system was mych more boring and uninteresting. Jump into system, honk to find stellar bodies and... tedious and time wasting "activity" followed. Dull flying for hours just to get within scanner range, observe scanning icon spin and done. Moon scanned. Now let's fly 6k Ls for there's our next target. Truly engaging and interesting gameplay.
Now, current system. Jump in, honk to discover star and orbit lines. Power up scanner and ACTIVELY search for stellar objects. Within few moments whole system is scanned. THIS is the clou of the change.
I agree that past that it's same boring stuff - fly there and see repetitive scenery. But the case is HOW you learned about those bodies. New scanning mechanic is plain awesome. It requires effort, it's active feature that relies on your skill. You learn using spectrum, you can pinpoint valuable targets by just identifying icons on your scanner screen. This change alone made whole exploration more fun and interesting.
No more dull flying just to scan thing. No more "meh" for seeing rocky bodies only. Well, it's still meh but you can get exploration data just for taking a photo. Meh system but will provide some nice credits. And you can make your dull flying just to probe target you really like.
So I believe you have bit mixed expectations. Current changes affect how we identify things, not how those things looks like or what they offer.