Let's start this thread out by saying that I really enjoyed this Alpha and I was glad to be able to participate in it. I think for being in Alpha it was a very successful weekend. It of course did not go without problems, but I was expecting such.
I was able to play on my brothers Xbox One and got a code the next day on my PC. I decided to hone in specifically on the knights and even more so on the Conqueror. Between my brother and I, we were able to "prestige" the Conqueror plus some additional. We raised the Warden to about 15.

Let's talk shop. I will try to break down specific points I would like addressed. I know this is the Alpha so things are subject to change, but let's start anyway. Please remember this is the point of view of someone who solely played the Knight Hero's, but who watched all of the tutorials and studied each move set for all playable Heroes.

Combo List
The Knights combo list is very lacking when compared to the Samurai Heroes. When I think of the word combo in fighting games I think of a chain of attacks that when performed correctly does something unique. Chaining normal attacks together isn't a combo it's a chain of normal attacks. Perhaps this is a presupposition that I need to deal with.

Conqueror
I personally found myself, when playing the Conqueror, never needing to use any of the listed offensive combo attacks. Another issue I found is after hours of playing and winning more than I lost I discovered that I rarely used light attacks. They were easily blocked and often vs. the Orochi were more harm than good. Instead I looked for when I could safely and effectively get in that one heavy attack. After landing that heavy attack I would reset the fight by guard breaking or shield slamming the enemy out of my face. Rinse and repeat until the enemy was dead. I'm not trying to say that Light attacks are pointless and shouldn't ever be used, but in my experience I used many more Heavy attacks than I used Light. I feel like the cause of this was a lack of an actual combo list.
Boons: Charging heavy, Shield slam, Shield block + Heavy attack counter
Needs work: Offensive combo list. (RT RT shouldn't be a listed combo attack.)

Warden
I didn't play the Warden as much, but I feel like he suffered similar problems to the conqueror. The Warden did have the benefit of auto landing an additional light attack if his first attack landed, but that really in my mind isn't a combo, but more so a passive ability. The only real combo I felt was probably chaining the shoulder charge after landing an attack.
Boons: Counter Up Guard, Chaining shoulder slams, auto 2nd light hit after 1st light hit.
Needs work: Offensive combo list.

Dominion
One thing I noticed is that there are no viking foot soldier options only knight and samurai. I find it odd to be playing on a viking themed map with knight and samurai foot soldiers fighting each other. (I'm hoping to chalk this one up to being the Alpha)

On the Knight themed castle map the blue defending team is the samurai. What? Why is the defending team of a Knight's castle the samurai? Why, if they are defenders, are they having to crash through a portcullis to reach the battlefield? Fix please.

When climbing up and down ladders I found that you can only attack upwards. You would think someone could kick downward. (if you can attack downwards please correct me)

Steel System
If I'm paying $60 dollars for a game plus more for eventual DLC I shouldn't be required to pay steel to unlock certain classes for customization. In the Alpha you could play the Orochi, Berserker, and the Conqueror without recruiting them, but if you want to be able to customize them, which of course you would, you had to recruit them using steel. Same with executions for the ones that had them available. I bought the game give me the things. Steel should be used only for the loot system. I'm not even sure how much I like the ideal of this steel currency.

This concludes everything I can currently think of. overall I had a positive experience, but would like to see some things change before the final release.