I guarantee whatever they show will be met with vocal criticism as that's just a predictable groupthink in response to modern BioWare irrespective of justification. It probably wont be exactly what some people are expecting or want, and others will nitpick at trivialities that otherwise get a pass in competing franchises.
It's more just the woeful marketing leading up to the reveal that I think has scattered reception. When all is said and done an November 7th blowout may make the leadup cynicism redundant. But nevertheless the efforts gone towards keeping Andromeda a secret while in the same breath still drip feeding details has not worked to their favour.
As it stands the game is in such an unusual place. Officially we've have so little confirmed, information mostly comprised of art assets, early tech demos, and lukewarm teasers, coupled with off-hand announcements in interviews (like learning about the Ryder family). For the person, regardless of fan mania, who just want's to know more about Mass Effect: Andromeda, the specifics have been usually inconsistent and muddied in delivery. It's really hard to pinpoint exactly what the project is, and about if you're not following leaks and other details (and who says the leaked content, like the survey, are even relevant any more?) the marketing arm for Andromeda is a mess.
If the objective was to build a Fallout 4 style hype machine and marketing lead-up, BioWare and EA have failed. They were probably off on the wrong foot right at the start when they first announced the game existing at all, given Bethesda cleverly stayed mum on the project (despite its obvious existence) right up until the reveal. At least in Bethesda's case they could leverage the "we're not talking about the future of Fallout", but EA/BioWare couldn't with Andromeda. In their case they had already announced the game, and so fans kept asking to see more of something they new existed. And those somethings so far have been bunk.
They just need to get it done and dusted, basically. Give people/fans something tangible to talk about. And if there are concerns and worries about certain gameplay elements and content, they can be properly addressed and discussed instead the vague nothingness we have at the moment.