Here is a great idea that I came up with, for those who want to solder/align the switches perfectly to prevent mis-alignment issues:
Solder only one terminal of the switches, put the keycaps on, correct the crooked switches by re-flowing the solder and moving the switches, after you're satisfied with their alignments, solder the other terminals
It's doable with 2 terminals soldered, yet it's extremely hard to achieve in that case