Not being like an MMO is a good thing....Unless everyone buys Odyssey, the problem is not solved.
Though even before this new Horizons / Horizons split, Open has been terrible lonely for me for a couple of years now, with the exception of very very VERY rare bounty hunting CGs. These days I might as well log into solo if I'm going to play. It's a night and day difference between this and a proper MMO like ESO.
Mildly-multiplayer-online would be nice instead. (And is why ESO made me really grumpy when it took people's desire for co-op Skyrim and turned it into Guild Wars: Tamriel Edition).