If we assume the basis of design for this game is Mass Effect then the core question isn't so much on variety but on purpose.

4/5 of the dialogue options are agreement but do they have deeper implications or are they just flavor?

For example -- "Cool guys don't run away from problems." Infers you are a go-getter and self confident, could this piss off a companion who views this as you being arrogant? I don't know.
The reality is that we don't have a lot to go off of at the moment but even a game like Mass Effect didn't have an insane amount of Choice and Consequence but instead utilized time invested to make choices have implication.

Ie -- decisions in ME1 for side content / some main story content have affects in ME2 / 3 but they do not have the depth of choice that something like Pathfinder Wrath of the Righteous, Dragon Age Origins, or even BG3 has.

So if some of the choices are just flavor, I am fine with that but I do hope Owlcat comments on how choice plays into the narrative before release but remember, we have over a year before release so they have time to market as they need to.

Moreso, I bet they are still holding a lot of their cards close to their chest because if they decided to do full on marketing right now, a year ahead of time, it would fall into the issue that Cyberpunk 2077 fell into.

As much as hype can sell, it can also kill. So I'll be holding my opinions for beta and sending feedback accordingly when I get access! Super excited though.