I'm not sure if there will be a second leveling primal this time around.

Now this is purely speculation, but we're getting an extra dungeon compared to SB and HW.

They may only want to have one relevant EX primal around for 5.0, to avoid one of their weapon sets being better than the other, or having to give one of the primals accessories or something which can be a bit of a letdown like they did with Lakshmi.

Now it's ENTIRELY possible there's going to be another primal in 5.0 and I'm just reading too much into things, but I think it's plausible that they decided to make one leveling primal and one msq finale trial for 5.0, with Titania EX being the 5.0 ex primal, and whatever the level 80 boss is as the 5.1 ex primal, and give us an extra dungeon to make up for it.