Again, Reality Warping is like vague.
Does creating stuff through matter/energy manipulation count as RW?(While Wanda's probablity route is gather energy to alter the path of events for a certain thing to happen.) You can argue Matter/Energy Manipulation actually just reshape matter and energy, but again what Wanda is doing is also investing energy to change stuff.(The course of events, or say the story.)
There is also an argument that only those who can directly affect the nature of reality(in Molecule Man's words, information, story.) count. But the results are too similar to tell.
Maybe they should just stop dwelling on the results/effects and explain more about the mechanism behind.
Modred the Mystic and Crystal are both element manipulation but they are way different in nature with one powered by Darkhold and the other being an Inhuman.
Wanda and other magic user may achieve similar effects, but their power still work differently.
One of my own take is that mystical energy are all formed to some extent, Elemetnal, Natural, Spiritual, Light, Dark, Emotional, etc. While other magic users usually would directly use those energy to cast a spell.(For example, extract energy from Crimson Cosmos to use the Crimson Bands of Cyttorak, but that energy cannot be used for other spells.)
IMO Wanda's Chaos Magic will break down any form of mystical energy first and then reform them(or that her probability power will require the most basic and primal form of energy), allowing Wanda to make use of any mystical energy for any means.
But it's easier said than done since it's like creating a machine out of metal scraps compared to others who just assemble a machine from pre-existing parts.
One of the limitation other than energy that I can think of that should be added is that she cannot create stuff beyond her own understanding. House of M: Civil War, for example, explained the history of HoM AU, it's not a Utopia like Bendis claimed to be, it had a rough history. Things created will still have to make sense for Wanda herself.(Or whoever hijacked her power, like Morgan.)