Andrewgr2 - I wondered that as well! Maybe the "Redundancy" means it carries TWO 17kWh batteries? If so then you can double my "time to recharge" calculations! I assume they only run at full power to reach circuit height (1000fpm was mentioned), and then cut right back. Obviously it is a slippery machine, but even so... That being the case it may actually NEED reverse thrust to get back down!
No instructor is going to venture far from the airfield with only 90 minutes (tops) endurance, and what's the betting that we would soon see one declaring a "low fuel emergency" in order to jump the circuit queue, and get down before it all goes quiet? If it was to be used at a fairly quiet airfield with only one or two other aircraft around, AND there was a stock of batteries available for quick turnarounds, it might make sense for teaching basic handling, but there is still the need for "differences" tuition before letting students loose on the rest of the fleet.
And let's not forget that Lithium batteries have very specific charging requirements - overdo it and they have a tendency to catch fire...