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Each patch doesn't mean they've only worked on that patch and nothing else. Any patches we're seeing are to keep us interested, remind us the game is still there, give us more things to play with and help bug test and balance test. It's quite possible that a lot of the 1.0 changes/content won't show up in any patches leading up to 1.0.
I'm very interested in seeing the faction system patched in before 1.0 though as they said it would show up during 0.9 somewhere. It's a significant system that is unique to LE, very different to other games. It'll need a bunch of testing to ensure it's working as expected and produces the results they want. If they withheld it until 1.0 and it didn't work properly, it'd potentially be a big disaster, as it impacts one of the core systems of any ARPG, loot.