well everything about remastered is better outside of the multiplayer features, so basically everything. graphics, balance changes
If you're asking for the very only official War2 Remaster rebalance patch ever released by Blizzard, this is actually available in War2Combat - Multiplayer - game option in Lobby.
There's a small dropdown list there that allows to select "Blizzard" option which is the same rebalance set up by Blizzard on Remaster.
This option is 4 months old and i've seen literally nobody talking or playing with it, which makes no sense to me because it brings an actual chance to competitively play with Human race and win in multiplayer. People are stucked instead with the bloodlust fest from default game balance.
If you refer to War2 Remaster AI graphics, I was thinking to import War1 remaster graphics on the future. At least getting few contrasts from Remaster and classic, buildings seem almost the same to me. This can be done, even though I see 0 interest from anybody in community to make this done. I could do it and its possible, still.
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The only 2 options I saw that are better in Remaster rather than War2 Classic (Combat) is to have health/mana bars above units and 12 units selection.
At least the health/mana bars can be fixed up and it was said by one of War2Combat developers, but 12 units selection is way too hard because its hardcoded to many functions. So this would be pretty much the only thing that cannot be imported here.
Yet, if you're looking up for other fancy quality of life features in War2 classic (Combat), there're several mods already for this game version that were made since 2019 and another guy known as Mistral, which have several enhancements for the game. Not only audio or visuals, but things like:
-improved AI
-rally points
-repairable catapults
-game timer
-hotkeys program
-widescreen
-actual game support, instead of Remaster which has none. And neither war2classic had ever support by Blizzard
-community members which still make multi/singleplayer custom maps quite unique.
-Over 20 mods already for War2 (not just tweaking some map with certain unit restrictions & default AI).
The content is there but people dont simply give attention to, yet thanks in advance if you're interested in any of them.