Just finished my playthrough/LP, and encountered some weirdness in the last battle. They're not TOO serious, but they may make the map easier than it should be...
1. As far as I remember, the four reinforcement tunnels are supposed to keep spawning enemies... but they all stopped spawning after 3 sets. This means there's no need to engage the shadowling groups... which can be considered a mercy, since they can pretty much one-shot any character once they stacked enough mental resist debuffs on them, ouch! I actually didn't mind this, since the slowdown was VERY severe this time for some reason (the entire battle took over 3.5 hours...) so I just focused on the levers and Tarion after the immediate threats were dealt with.
2. Tarion didn't move from his spot... apparently because he can't fly! I found this out when I tried to yank him out with a Gravity Spike + Grapple Chain combo. At first I was pretty disappointed when GS didn't work... but then the Grapple Chain worked and actually caused him to take damage! He behaved like any non-flier: having to waste his turn trying to swim out of the lava, only to get pushed back ad infinitum.
3. The archers guarding Tarion seem to have a 5-tile attack range (should just be 4, unless they're l33t haxors). Possibly intended? In any case, Kinetic Pull Solves Everything™.
4. The score didn't tally up -- I just got the last map's score as my total in the end. I checked my savegames, and totalScore in all of the ones made after Aug 6-ish seems to be 0... possibly related to 1.041/1.042 changes? In any case, this may just affect those of us who carried our saves over instead of restarting, in which case it's no big deal.