Feature creep is the mass addition of new features to a product without going back and expanding upon old features too.

Since Minecraft going gold, it seems that few updates have focused upon expanding upon and reworking old mechanics and features. Looking back at the 10 updates we've had since Minecraft was fully released, the updates that have had a major part of them devoted to working and expanding on an old feature are 1.5, 1.7 and 1.9. 1.5 is in my opinion the best example of a non-feature creep update so far, since everything was focused on redstone contraptions.

Other updates, like 1.4, 1.6 and 1.8 seemed solely focused on adding several unrelated smaller things and didn't expand a lot on any of the previous updates.

Personally, I really liked 1.10, partially because of its speediness in being completed and partially because of the new features, but I also felt like the new features were somewhat gimmicky and didn't actually add much to the overall Minecraft experience. I wouldn't mind seeing a return to an update every month or two months that works on refining and expanding a major part of the game and adding a few new toys to balance it out along the way.