The current PTE (one started on December 23rd) was not setup for a particular test as far as I or anyone else on the world is aware. The PTE was setup as a 'regular' Level 80 world, which have been tested and rolled out in the past. If bugs, issue or problems have been corrected (such as @Polux37 mentions) then we weren't told of the changes.
The PTE is always a small world and, as is stated above, without cheats would take a very, very long time. The PTE is different in many ways, not just those highlighted.
For example:
a) the number of Lakes and size
b) the number of POI's
c) the bonus levels that can be reached overall
d) the base buildings all start at level 60.
polux37 wrote:
Tunnel exits are up to 81 not 62.
POI levels are up to 80 not 62.
Guardian bases are lvl 80 not 65.
Regular FB are up to 75 not 62.
And the fortress most likely will be starting at 110 lvl not 95 lvl.
If I recall correctly, the changes to the tunnels, POI levels etc were made when an few worlds were increased from being level 65 worlds and then they were rolled back. Maybe they were rolled back on all worlds, even the few that were level 80 worlds at the time.