Recent beta test (26-30 Jan) was my first experience with for honor and though game is close to complete these are the issues I encountered.

1. Connection: often being pulled out of 4v4 matches.
People being unable to join sessions thus making everybody else get stuck on loading.
Sudden disconnections in the middle of the match later followed with being matched with other people.
2. 1v1: I have encountered people who suddenly leave after I've won 2-3 matches in succession leaving me with bots (though it might be connection issues I would imagine this being a problem when game releases)
3. Glitch encountered: rival left the game and his substitute bot became invincible afterimage invincible to all damage/collisions thus forcing me to sit through couple of matches waiting for timer to expire.

Desired additions: would love to see competitive 1v1 and 2v2 game modes, better UI to see my impact on faction wars, war assets earned showing up on reward screen after games, better ways of managing 2v1 combat (very unintuitive and ineffective usually ending as bullying receiving end. Though I understand that 2 players should be stronger, at this moment 2v1 encounters end up just being a bunch of random button mashes) and addition of character ban in 1 v 1 matches ( though banning 1 out of 9 may seem extreme, still banning could improve competitiveness of the game being able to ban hard counters to your character is crucial in my opinion to reduce chance of slightly unfair matches or just plain only orochi duels which is not an op or out of balance character, but rather easier to learn and use in 1v1 encounters compared to few others)