Yeah, it's been too long since I watched the Rebels WBW episodes so I'm rather hazy on the admission requirements. Maybe since she was brought in once before she has an all access pass now? Regardless I'm not going to lose any sleep over it...Spoiler:That would just create a different set of problems, though.
In the past, the WBW was shown to be a realm that needed to be opened to the living person. Ezra had to open a portal himself to access it, and Ahsoka had to be pulled in. If Ahsoka is *actually* in the WBW again, and not merely having a hallucination, then she would have needed to get pulled in. By whom? Or by what?
An afterlife version of Anakin is part of the Force itself. Whether it was afterlife Anakin, or the Force itself in a more general sense, there are so many problematic implications either way. To me, that'd be such a massive cheat that would also undermine any sense of free will implied in previous Star Wars.
What this would do is mean that no one's greater destiny can be avoided because "the Force" has bigger plans for everybody. Everything can be controlled or manipulated from another realm. If so, what have we been watching? Luke would've had no possible role other than to ultimately redeem his father if the Force deemed that to be his greater destiny. Everything would be predetermined. The same goes for every other Jedi involved in major events. If they are in peril, it's up to "The Force" as to whether or not to save them in service of their destiny. It'd be such a self-limiting direction to take the storytelling.
If they've brought the WBW back in this way, the plot logic is going to be (justifiably) torn to absolute shreds in such a way that you'd have to willfully ignore so many unavoidable consequences in order to stay invested in the stories. Anything other than a vision/hallucination is going to turn live-action SW upside down.
More to the point, if the WBW exists outside of space and time and that's where Anakin is then he shouldn't be aware of the passage of time lol...I appreciate how you're reconciling it, but just read your own words to see the contradictions being necessitated:
"Anakin says he didn't expect to see her so soon it implies that he didn't expect her to have died yet."
Is Ahsoka's death predetermined or not? Does afterlife Anakin (consciousness residing in the WBW) know when she's supposed to die? If so, how could he ever be "surprised" to see Ahsoka in the WBW at any time in her life if her destiny has been predetermined?
And I disagree about how "will of the Force" has been a part of SW before. It was never explicitly defined as a reality of predetermined *and unavoidable* destinies until the WBW plot device. If Ezra wasn't changing the past when he pulled Ahsoka out of the Vader duel, then everything is fatalistic in SW. But at least the animated series can be interpreted more loosely than live action.