That could be true to. It just goes back to at this point we can't make too many assumptions about the upcoming show. Romulans may play a prominent part, they may never be seen again after the show is established, or something in between. Or some other species. Or maybe it won't be villain-centric at all. It's fun to speculate with the limited information but we may all be wrong. It may end up being the butler's fault after all
Given what we know, we can only talk about our preferences of what the show should be about.
I am just saying personally I think this should be about Picard's skill as a diplomat in the face of the destruction of Romulus and the fate of the remaining Romulans and in my mind it would make sense there would be a faction of hawks and a faction of doves, with the dovish Romulans wanting to resettle on Vulcan, which is not an easy task. The hardline Romulans would be antagonist force, but they wouldn't be there all the time. This is a test of Picard as a diplomat, not as some action hero, maybe some younger captain can defeat a psychopathic Romulan admiral or something, but Picard wouldn't be doing that, we do not need to go back to action hero Picard.
I would like see some more Romulans in recurring roles and not only as a villain in the series but also as normal people, having Picard meet with the leader of the peaceful Romulans, we can see poor Romulans in refugee camps, maybe even a Romulan joins Star Fleet.
If none of that happens, that's fine, but I think there is an interesting with the fate of the Romulans.
Personally some of my favorite episodes are the ones with no villain: Cause & Effect, The Inner Light, The Visitor, Flashback, Disaster, Relics, Blink of An Eye, Parallels, Far Beyond The Stars...
Problem solving episodes, character dramas, explorations of the heart/soul. Hopefully this show can give us some of that in addition to whatever larger story plays out.
And there are also great episodes with villains in them: Best of Both Worlds, Chains of Command, key Dominion War episodes, the Xindi Arc, Arnea, Day of the Dove, Waltz, Space Seed, Errand of Mercy, Yesterday's Enterprise, Balance of Terror, etc and there have been terrible episodes without villains in them, like Twisted or the Loss, you can pick good and bad episodes from any category.
What I am saying is, I hope this show puts more focus on Picard as a diplomat (Picard being 80 and still stumbling into spacial anomalies while commanding the Enterprise wouldn't make sense), but diplomacy needs to be a challenge and if all the Romulans agree to be peaceful at once, that is both unrealistic and kinda dull. That doesn't mean we need to see a hawkish Romulan admiral in every episode, some episodes would be the challenges of caring for these Romulan refugees and I like to see more heroic Romulans, maybe a Romulan can join Star Fleet, Picard can become friends with the leader of the Romulans who want to settle on Vulcan. Star Fleet may have save these Romulans from the hardliners, but that is not the focus of every episode. But that is just what I want to see.