It is impossible to know what players who have never played WoW will think. They have no reference point to compare against what they are experiencing. You can't empirically assume everyone's reaction. And to wit-Blizzard may get criticized heavily (here especially) for how they handle end game systems and the like, but they have always done a great job in creating games and creating great experiences. I'm just happy that current players don't have to level alts through BfA only. for new players, as I said above, that doesn't matter since they don't know the difference.
And to add an even more salient point...how many new players is a 16 year old game that is launching its 8th expansion going to get anyway? I would wager not enough to merit a lot of concern, I can tell you that.
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That's true. I personally favor Wrath leveling to all else, so it will be interesting to see how they rework the leveling curve for each expansion.