Honestly, I'm not sure how to answer this. Yes, you will likely find new content from last time and it will (probably) be enjoyable. No, you should wait a week or two for the next update with bug fixes and other things (possible extra content) before playing.I'm hesitating if I should play this update or not. My last update was 0.14c and I was waiting for this one to play again but it seems like this was mostly a tech update.
Can someone tells me how long it generally takes for new updates to get published?
The current version is a BETA and was just for final tests before the actual release. Personally, I would say wait for the new steam version to be released and play that. I HAVE played the current version, and it was enjoyable, but honestly wish I had waited for the FULL version that is supposed to come out soon (I'll grab that and play as well).
Hope that helps.