the writing is sub-par.
The spoilers thus far for the remaining shows demonstrate that the writers are grasping at straws to maintain an audience.
Funny one liners were great for Jack, as he was the only one that really did it. Now, everyone can be funny and cheesy. This applies to SGA too. That annoying sneezing girl drove me up the wall.
Vala had potential, but the overboard sexual inuendos and the somewhat dry humor show that the writers are trying to hard to make us like her.
Character development takes time, they need to understand this and write her accordingly. Jack took a few episodes to be likeable funny. His humor is somewhat corny at times, but it's his humor and we love it!
When RDA spoke and made jokes, often times allusions or references, it was funny because it didn't seem forced.