"only XL-2"

Regarding 6lm10a - I don't know, maybe it's also related to one-way roads? On WT.

A sample of 20 generations shows that in 40+% of cases, blue receives completely unviable generations (15% of which have only one path to the exit, a one-way road), and in another 10+% of cases, there is only one path for 3-4 respawns.
Red, on the other hand, always has a path in 100% of cases.
*By unviable, I mean generations where after 4-5 respawns, the network of roads ends in villages or camps, there are no forks - you have to develop through off-road or control spells. It's not fatal, perhaps, but it's very unpleasant and makes the game less enjoyable.