I will rush to level 100 as fast as I can (and already started preparing potions and stuff, fyi) regardless of titles being present or not. Just like I did in every expansion so far.
The rush to max level is one of the very few engaging and skill-based* things this game has to offer nowadays and I honestly don't really give a single damn about the existence of achievements, titles, whatever. I do it for my personal enjoyment.
*skill isn't and has never been about simply being able to push X and Y buttons harder. Planning, info gathering, finding tricks, and creating better routes/strategies(aka intelligence in general) is just as much a part of it.