The only GM invasion I didn't care much for was the 4th, which seemed a little inconsistent, overpowered, and then just went a little nuts with the "Light" being introduced just to end it. I still think the only reason people did complain quite as much as they did, though, was mortality.
Anyways, something I loved about the fifth invasion, story aside, was a simple mechanic. I n the previous invasions you had immigration to BT cut off. I enjoyed the fact that it stayed open this time, giving everyone a chance at the fun. Please keep that as a constant, even if you have to make new arrivals shipwreck near random ports- let them at least keep coming.
The third started out great. But it got dull when the undead and monsters left, and it dragged on for way too long.
I did not enjoy the fourth invasion, the mortality hollowed out realms and depopulated a continent that already had one of the lowest character per region ratio (if not the lowest of all). The monster GM abusing special mechanics and other such incidents did not help either...
The fifth invasion was better than the fourth, even if not as memorable as the third. More straightforward, which I think many appreciated over the confusing plots of previous invasions. And even though this invasion crippled Enweil much more than the last, and strengthened Rio much more than the last, at least it didn't feel like a GM's vendetta this time around...
While GM invasions offer a lot more possibilities than scripted invasions, they also do present a whole lot more frustration. The idea of invasions by scrolls seems interesting, but it also seems to be limited to very localized mini-invasions, so I'm not sure if that will be able to bring the same kind of atmosphere. Still, seems like a good idea.
