Utility in WoW is what you can use in combat that affects a fight positively for you and/or your team.
Port is a very good kiting tool, and can be used for a lot of raid mechanics and kiting to extend life. You don’t need to immune a damage hit to make this utility good.
Leg Sweep is the single best PVE stun in the game for group packs. This is utility.
Clash is also utility, it allows for repositioning, kiting, interrupting. Is it more awkward than war charge, sure, doesn’t change what it can do.
It would be very easy to make FSK a stun, and this is also considered utility but it’s under the umbrella of mobility.
Paralysis is utility. CC is utility. Para is one of the single best utility CCs in the game.
Mystic Touch is utility, yes. But it’s also just considered a debuff buff.
You typing this up shows how unaware you are to what terms are coined for what. You don’t know these bare basics of what is considered utility and spew information that is incorrect. Don’t tell me you’re a “high rated PVPer” after this, because I’m too tired to laugh today.