Yeah it looks like you need to support the square X, the rectangle X's look decent but they also look like they are also full depth. i would hold off on the temp change until you correct the support issue. You might need to look at the level of the plate and run the leveling routine as it might be off a hair not allowing a good stick on the raft but you might also benefit from the thicker raft as well.

Also forgot to mention in my earlier post, take a look at this http://www.thingiverse.com/thing:492067 . Outside of the occasional twisted filament jam from the spool I never get a filament jam at the head since I started using it.