Just picking up this discussion because I thought it was interesting, and the more I play of Valhalla the more I think it becomes a pretty disappointing peon to colonialism and Norse mythology. It sorely needs
some attempt to present a balanced view that Vikings were, largely, pretty horrible. You wouldn't exactly have to go far to find material for that, it drips through sources like Abbo of Fleury's
Passio Sancti Edmundi, Wulfstan's homilies, the Anglo-Saxon Chronicle, and many many others. The decision to ignore that (and it is a decision, you can listen to the game designer's talk about it) in favour of a whitewashed presentation of the Vikings as this wholesome bunch of lovely dudes on a jolly to England, isn't so much neutral as a very overt act of historical interpretation. It is impossible to do anything
other than re-construct the past based on modern values, and Valhalla isn't unique in the fact that it has taken editorial decisions in its portrayal of the vikings.
I do think there is a more serious point at play here. Assassin's Creed has rarely shied away from inserting itself ham fistedly into historical debates that have a cultural relevance in the modern world (the first game taking us to the Holy Land, being the best example), and Valhalla is not an exception here either. Norse mythology and saga accounts are pretty dominant in far right and ethno-fascist thinking (Dorothy Kim hits many of the right notes here, for some background:
https://time.com/5569399/viking-history-white-nationalists/ ) and it's irresponsible in the extreme for Valhalla to unquestioningly replicate those themes, talking points and ideas, with its presentation of the era. For most people, it will simply be a game that they'll play and move past, but (unfortunately, perhaps) Assassins Creed has recognisable didactic purposes and will lead some people to greater familiarity with far right thinking. That's worth criticising.
Perhaps more relevant to most people, though, is that its whitewashed presentation of the Vikings is just dull. If for no other reason than story telling, inserting some moral ambiguity, recognising that the Viking 'settlement' was an invasion, inserting some moral dilemmas which go hand in hand with playing an invader, and adding some shades of grey to the story would at least prevent its story being so bland.