I totally feel the same way. Seemed like a lot of build up to just click a couple of chat options.
Seems like things were heading towards a three-way race to Ukaizo, with rival gods plotting to destroy Eothas, but then on reaching Ukaizo, there were two or three largely empty maps, then a couple of chat options and straight into epilogue briefing.
Some kind of battle with the rejected factions and/or rival gods' agents preparing to trigger their world-ending-stop-Eothas-plot, would have been nice.
But, that was my first play through on veteran difficulty. With 11 individual classes, 100+ multiclass combinations, not counting subclasses, three factions to choose between (four if you count remaining independent which I did on my first run), and 7 companions with their own storylines to squeeze into four party slots ... lots of replay options, even before DLC.