Three of my favorite builds, Felwinter Warlock, Gifted Tempest, and Wishful Storm are all slide melee builds, and I just think they're fun to play, I enjoy the extra level of interactivity (and it helps that they hit like a truck.)
One of Destiny 2's greatest strengths is its fluidity, and slide melees play right into that, they're not just powerful, they're fun to play.
The recent survey asked about new Void Melees, and I'd like to put out there that abilities like Lightning Surge, Tempest Strike, Flechette Storm, and Consecration are among the most satisfying loops in the game. Void Consecration with Destabilizing/Volatile would be incredibly cool.
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Here we go: 2 Slide Blinks. Warlock - Chaos Scepter Slide, Blink to the target, slams a staff with a huge void orb on top that suppresses with void blast. Enemies killed by the blast produce tracking axion bolts that also suppress. Hunter - Poison Volley Slide... fire an arrow that blinks you to the target poisoning them, you do a back flip and suppressing arrow storm fires down in an AoE around the target. Titans have 2 Void Melees.