First, let’s tackle the Dot Locator for “Use” (RUEB2024 §3.14)
I agree, the fourth paragraph in GTM 4.1 Spatial calculations (quoted below) gives us guidance regarding blank lines in relation to the numeric passage indicator or terminator that we simply do not have regarding blank lines in relation to grade 1 indicators, capitalized passage indicators, or their respective terminators.
The line above and below spatial calculations should either be blank, or should only contain the numeric passage indicator or terminator.
I would advocate for your #2 example, where you have replaced the blank lines around displayed material with a line that contains only the grade 1 passage indicator and a line that contains only the grade 1 terminator. For our convenience, I have attempted to recreate that example below.
⠼⠊⠲⠀⠠⠔⠙⠊⠉⠁⠞⠑⠀⠞⠗⠥⠑⠀⠕⠗⠀⠋⠁⠇⠎⠑⠒
⠐⠐⠿⠰⠰⠰
⠀⠀⠀⠀⠀⠀⠠⠎⠐⠖⠠⠕⠢⠼⠃⠀⠳⠕⠀⠠⠎⠠⠕⠢⠼⠃⠀⠳⠬
⠀⠀⠀⠀⠀⠀⠠⠓⠠⠉⠇⠀⠳⠕⠻⠘⠳⠪⠀⠠⠓⠔⠐⠖⠐⠖⠠⠉⠇⠔⠐⠤
⠀⠀⠀⠀⠀⠀⠠⠅⠠⠊⠐⠖⠠⠊⠢⠼⠃⠀⠳⠬⠳⠩⠀⠠⠅⠠⠊⠢⠼⠉
⠐⠐⠿⠰⠄
⠀⠀⠠⠁⠲⠀⠠⠞⠗⠥⠑
⠀⠀⠰⠠⠃⠲⠀⠠⠋⠁⠇⠎⠑