That’d probably make more sense. My idea was to imply that tracking Snoke’s miscellaneous stuff would lead him to Palpatine, like following a marionette’s strings to its animator.
But that’s hard to get across, and doesn’t make immediate sense as Kylo rummages through Darth Vader’s sock drawer.
I think it works well enough. The “determined to unlock the secrets of his former master’s power” is directly addressed and paid off in the opening exchange bewteen Kylo and Palpy. “At last. Snoke trained you well.” “I killed Snoke, I’ll kill you.” “My boy, I made Snoke…”
Right away, secret unlocked.
As for why he needed his grandfather’s sith wayfinder to figure out this particular puzzle, I think it’s implied that this is the latest in a string of clues that he has been hunting to unlock this particular secret. Maybe there could be a subtle way to reinforce this notion in the crawl.