Why would you miss anything? I think you are merely skipping over the part you have not missed: It's well designed and not a Google product. In a world with space for a thousand todo and project management apps, I am sure there is space for a slides competitor, even if that was all it has going for it (although I am assuming there is more).
That depends on you. Again: There is a whole slew of very much overlapping productivity apps out there. People are getting hyper specific about minute features and how they want the UX to feel, exactly. (EDIT: To illustrate this point, a friends choice of note taking app recently boiled down to the availability of (A) text background colors in (B) sufficient amounts and color variety with (C) good enough black-on-text-bg-color-contrast.)
As with every moderately sized app, there is bound to be a number of things that Pitch has its own spin on. Different enough for you to matter? Maybe not. Different enough for someone else to matter? Probably yes.
Knowing Google history in shutting down anything other than search, mail and maps, yes its a huge advantage. I was approach to use “Authenticator” app in new project and upon finding out its Google, I declined
One of Google core product? AFAIK, Google itself has _one_ core product, and only one, which is Ads. The rest are services meant to sell more ads, or get more user data so the ads are more effective.
Other products are usually spin out into their own companies and/or under Alphabet rather than Google.
Don't be so sure. Yeah, G Suite makes them money, free Google Slides or Docs doesn't.
After seeing them close down a couple of services I never thought they would close down, I don't think anything "free" is off-limit right now. Especially depending on how the US/world economy goes.
Keynote is also a well designed product not made by google. It is available on the web and supports real time collaboration.
But it seems like no one cares about web/collaboration in iWork apps and apple isn‘t really pushing it as a gsuite competitor. The sharing model is maybe not exactly work friendly.
So since gsuite is absolutely dominating iWork already, I think they have a shot by just making it more well designed than Slides.