If u hv a budget constraint and cant go beyond Gli then go for Gli A/T and enjoy the comfort of auto transmission while driving.
About the under powered thing, the experience varies from person to person and is completely relative in nature. If u hv been driving a 1300cc or higher manual car u will feel it under powered.... If u had a 1000cc or lesser earlier you'll like it.....
Corollas resale is good enough for all of its variants....
Also dont worry about fuel consumption that will likely be only 10% more than its manual variant..... Comfort has its cost.....