The Rangers have a sign of tangible change after their disappointing campaign that ended in the basement of the Eastern Conference. Jed Ortmeyer, their director of player development who also spent the first part of his career as a player with the Blueshirts, left to pursue other opportunities, The Post’s Mollie Walker confirmed Friday — creating a vacancy in an area where the Rangers have struggled mightily in recent years. Ortmeyer was initially hired for the position back in 2017, remaining on staff after the Rangers fired Jeff Gorton and hired Chris Drury back in 2021. But the Rangers’ inability to develop prospects emerged as a concerning trend, even during the recent seasons when they made trips to the conference finals. Jed Ortmeyer addresses reporters during a July 2024 press conference. Charles Wenzelberg They possessed three top-10 draft picks between 2018-20, and all of them — Vitali Kravtsov at No. 9 in 2018, Kaapo Kakko at No. 2 in 2019, Alexis Lafrenière at No.…