I really do hope they increase the current lore fidelity for the whole campaign, not just Stratholme.
It would be really nice to see, for example, custom skins for the high elves and Dalaran units and buildings and a proper looking Silvermoon during Path of the Damned, the same for the buildings during the Curse of the Blood Elves (it kinda feels wrong to use human building models for what is strictly a blood elven campaign, specially now that they are going to be high res).
One thing I think is a must, at least, is to have the last Curse of the Blood Elves mission properly themed after the Black Temple, make the Black Citadel tileset more like Shadowmoon Valley, so we can really feel like laying siege to the Black Temple to overthrow Magtheridon.
Minor additions could include having the Draenei models look more like Broken (Ashtongue) instead of Lost Ones, at least for the campaign when you meet Akama. Have the faceless ones more varied, at least a different model for the castes, similar to how they are in WoW. Please make Pit Lords head on fire, Mannoroth's head was already on fire during the classic Grom cinematic, it should be ingame as well. The Tomb of Sargeras could really use a revamp to look at lot more like what we've seen during WoW Legion. To finalize, make The Frozen Throne really sit atop of a big ice pillar, instead of a tiny hill as it is during the game's very last mission, I know that it looks like just a slope due to the game's terrain height limitations, but it could use it's own custom model sitting at the center of the map as a giant freakin' ice mountain, instead of just a terrain elevation.
But I also think it is important to have an option to simply play the old campaign as it were, that relic can't be completely erased.
