Yes, there are quality of life changes in the game they can put in, so why not? A simple example is the bag cleanup button. This in no way makes leveling easier in Classic, but just saves a minute or two of doing this manually. There are probably dozens of changes like this that have zero impact on leveling that they might as well put in.
One of the things I like about Classic is that we are all confined to the original game world. Every expansion spread things out. BC moved everyone off Azeroth.
That’s not a good thing. There’s a way to add content to the original game world that keeps players in it. I think there’s a way to add smaller expansions that are mostly new dungeons, new BGs, and maybe a new zone in Azeroth and perhaps 5 levels instead of following the original development path. It would be two separate games, but why not?
I doubt that will happen. What’s more likely is we will get BC and then Lich King, etc. But how can Blizz charge for those? I already purchased them. I might buy new content, however. Give me to two new dungeons for $10 and I might bite.