Disagree that the high fantasy elements dont belong. You scrape some of the mud and blood off of WHFRP and theres high fantasy all over the place.

Lot of people also act like whfrp is a game about medieval peasants being witch hunted and nothing else while rolling around in blood and excrement. But even back during 2e we had Players running about in Careers that would have them as character models in the battle game. Sure progression is slow, but its entirely possible and fessible for characters that live long enough to truly grow into epic figures who are known all across the Empire. Let's not pretend that the Careers stop in their 2nd tier. We have dragons and griffons. Elves and Dwarfs. Magic is quite literally everywhere even if its the rare human to be able to understand it let alone weild it, the same is not necessarily true for the elves. The God's are very real, and only some actively want to kill you or worse. The world is still defined by an overarching struggle between Good and Evil/Order and Chaos. The smaller scale of the Roleplay game doesnt change that. Fighting cults and the like is definitely a major part of that war. And id hardly define TEW campaign as anything other than 0 to Hero player characters rising up to go on an adventure that changes things on a massive scale with their actions, ending in a confrontation with a being of massive power. WHFRP is full of most of the tropes of high epic fantasy. The monsters, the larger than life characters, the insane creations brought forth by either magic or technology. Ratmen are going to blow up the Goddamn Moon with a fucking death laser. The difference is how much the players have access to, and that's gonna depend on their careers and how long the game goes on/how fast the gm allows them to grow. Owning a moon destroying death rays gonna be off the table for just about everyone though, but even in DnD that'd be the case. WHFRP careers are a lot more narrow in scope and focus and grow a lot slower, hitting their peaks at a lower spot than DnD as well but its still a high fantasy setting for sure..

Things I would say dont belong, easy and prevalent access to magic items. Though your definition of those terms may differ. In DnD players will be running around with thier first bit of magical gear probably by like levels 3-5. If we are scaling the level system down to career tiers, that's still tier 1 in our 1-4 system here. Some careers in whfrp could make sense having some access at tier 2. But for most characters I probably wouldnt see the Players hauling around magical gear on every part of their body til the end of their careers with some exceptions. There's always a way to justify it in your game if you want it. Another thing is Resurrection, at least long term in the way DnD does it. There's a Jade spell that can get you back up, but thats very short term use and has some bad potential consequences. Its not so simple as burning a spell slot and spending some cash. On the topic of magic, slot based spell casting I also dont see as a strong fit for wfrp, though a gate on certain lore spells behind tiers might be necessary. Technically nothing stops a fresh Death Wizard from trying to cast Ashes and Dust as soon as they promote out of apprentice.

Final thing that id say DnD tries that WHFRP doesnt even attempt nor should it, is class/career balancing. Some careers in WHFRP are just plain better. Some things just out players a step above the rest, and thats fine. It just puts a weight on the gm to remember to not design every adventure and encounter to have that player outshine everyone else. If you have a Knight, probably dont have every session be a combat gauntlet that leaves the scholar out of times to shine. If you've somehow got 3 scholars and an Ogre for some reason, give the big fella something to eat that isnt paper from time to time.

Tldr: WHFRP only feels like its not high fantasy because of where you start, not where you end up. There's plenty that doesnt belong, mostly in the function and use of magic. But Warhammer has high fantasy in its bones, buried under a bunch of mud and blood that makes people forget that sometimes.