To start let me say I really enjoy this game and I've spent more than 250h in it.
However, some things could be far better. As Eivor progresses in the levels, the game gets increasingly easy, instead of the opposite. Even with the difficulty in the higher level in combat, enemy leveling, stealth and exploration, the combat is still too easy, effectively removing a bit of fun out of the game.
I was expecting that as the game progresses, Eivor had to rely heavily on stealth and assassinations to be able to kill the hardest enemies, but almost always it ends up in melee action.
Speaking of Skills, the advancement is too fast and very quickly we end up getting all the existent skills. Perhaps there should be a limit on choosing the skills, just like for Abilities, to allow for different approaches and even replayability. In fact, the alignments should be meaningful, but because the difficulty is so low, there's no thought about choosing one over another. And eventually we get all of them!
What if each mission was designed to be completed with the 3 alignments in mind, so depending on the approach (melee combat, range combat or stealth) the player gets points to spend in skills of that alignment (Bear, Wolf, Raven). The player could choose the way how to fulfill each mission depending on the skills that he would desire to get. Some missions could be harder/nearly impossible for certain alignments, just to force some spread of skills.
Also, it's a pity that with so many armor sets and weapons, we end up using just a few because they have 3 levels and its a bother to switch from one set to the another. I'd rather have less quantity and no levels, but with far more impact in certain stats or skills or missions. in fact, some missions should also be easier with certain armor sets, to make the player actively search for them.
However, all this could only make sense if the combat was more difficult in first place. At least for the tougher enemies. The Lerion Daughters were a good mid-game challenge and Morrigans were good for late-game challenge, but by the time I got to them I already had the super-weapon "Gae Bolg" and the druids and wolverines were no match.
Basically, to get a better experience, the player has to make a lot of auto-reduction of power (by not using skill points, using weaker weapons, etc) and that's not really fun.