Yes, we've just reshot the 70-346 because June 30, 2017, newer updated exam objectives were released. Also, the tools that were mentioned from the original series has been updated along with a new interface in O365. The show itself is based on the newer objectives. Your time spent in the older series will only be of benefit to you. So your time has not been a waste. The real difference has to do with the newer interface and the tools. If you're doing your own labs you'll see the interface changes so that shouldn't be of much concern if you've used the older course. As a side note, The great people at Rackspace use our Office 365 shows as their fundamental understanding of how to get started with O365.
The 70-347 show was shot earlier this year and is up to date. This show is powershell driven in the same way as the exam is powershell centric.
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