I decided to take a closer look at the handwriting of the scribble page and the only other handwriting sample we have of FLEK's--the handwriting on her passport application.
First, compare the two words Dallas: The D's are different and though both samples use capital A's in the middle of words, the capital A's are different as well. One is more rounded at the top and one more pointed.
Second, compare capital M's--very different. One has rounded peaks like a lower case M and center line of the m reaches the bottom of the letter. The note writer's M's are pointy at the peaks with high center swoop line.
third, compare B's. There is only one B on the application but it appears to be written like a 3 with a line in front of it--two sections disconected. The B's on the note page are written more in one fluid motion and all connected.
Fourth, compare lower case y's. On the application the y's have a rounded hook. On the note they are angular.
Finally, compare the "These Eyes" to everything else. I flipped it 90 degrees to make it easier to compare. It has been noted before in these threads that the "These Eyes" has those curly capital E's in the middle of the word and FLEK used those capital E's in her writing. The rest of the note does not have those capital E's. The y in "These Eyes" is also a hook style like used in the application, not like the rest of the note.
The main thing these writings have in common, IMO, is using a mixture of capital and lower case letters for the middle of the words.
After this analysis, I'm prepared to theorize that the majority of this note was NOT written by FLEK--it may have been written by someone close to her (parent, sibling, etc.), however, who had a similar style of mixing capital and lower case letters.