After finishing the tutorial on the first day my first 2-3 encounters were unwinnable because I encountered Tier 0 Stage 3 Illuvials or three T0 Illuvials at once. I wasn't faced by this because I knew that there are easier encounters and I eventually get my chance. A new player won't know that and is eventually demotivated by that unlucky start.
My suggestion is that the future tutorial features the first t0 run with easy encounters only. No need to make a stage 0 run difficult for beginners.
I know the team has a lot to do and needs some rest as well. Therefor this isn't something that is important right away. Maybe, this point is already on the list but if it isn't I just wanted to add this point to that list for the future.