Either you like the game and play it now, then you won't mind starting over with a new seed.

Or you don't like it (or it's in the "meh" category), then you won't like it much better when the mistlands will hit.

Valheim is not just a plain action game. A lot of it is the exploration of a new seed and the building of new bases. The lure of the ocean.

If that doesn't sound attactive to you (and it may not), then Valheim is probably not your cup of tea.