It would have new armor and tools and enderite I think this would make minecraft little more cooler there should also be new end mobs also maybe you could make the warden gard the end portal and make minecraft a little more harder to beat
a new version of netherite is the last thing minecraft needs right now. right now it needs to add some sort of replayability to keep players playing longer than a few hours on each new world, like dungeons or special crafting recipes that arent unlocked right away which can dramatically change your experience (e.g. ships or a special smeltery or "skills").
Just another ore for another set of gear isn't really adding much nor unique, especially after netherite was just added. Wardens don't have anything to do with the End dimension, nor are they designed to be battled anyway.
Extra challenges would be great overall (not just for the End), or even to improve the existing bosses.
If there was an End update (whenever that could occur), perhaps some new content and terrain generation changes, but while retaining the dimension's overall "barren" and "eerie" themes.