I think it's actually way too slow at the start. Yes, I do get that this is a game for people who like reading, but in PS:T you at least get busy exploring the Mortuary right away and try to find your way out. You're on the move kinda, actively exploring. In this, there's just a *lot* of text right at the start and you're stuck in two tiny areas for quite a while. That part of it is not very exciting unfortunately. I guess/hope it frees up when you get to the Sagus Cliffs but I do hope that you won't just have a feeling of walking from text dump to text dump. Part of what made PS:T so great was that, no, it didn't shy away from having a lot of text at times, but exploring Sigil was still a pretty smooth experience. It didn't feel like the game was hitting you on the head with a lot of text just for the sake of it. It just feels like a rich world. I hope they won't "overwrite" this one.
Could you be a little more specific about the text here? One thing that is tricky with the comments I've seen is that they complain about too much text "at the start" but "the start" could mean a lot of things, and it encompasses a few different segments:
(1) Falling.
(2) Interacting with the orbs/mirror.
(3) Talking to the Specter.
(4) The Tidal Mere. (Which did you get, out of curiosity?)
(5) Talking to the Specter again.
(6) The Aligern and Calistege conversation.
I realize that the answer may be "it's too much all taken together" or "each and every one of those is too much." But since you said you liked the Mere, I'm wondering if it might be more specific, like the falling sequence felt too long or something. The more precise the criticism, the more confidence I have that it can be fixed.* At this point, there's no doubt that "the first part is overwritten and too slow" is on the whole team's radar, but a more pinpoint target would be nice.
(* Note, I can't say whether anything will be changed. The people dislike something doesn't necessarily mean that it's broken, and there are factions on every side of every issue. I just have fairly low confidence of things being fixed when they're described in general terms like "the pacing feels off." This may come from my day job reviewing legal briefs, where I've found that comments like "this section isn't very persuasive" tend to elicit no improvement.)