Bracing needs to allow turning without breaking it
More visual variety
Faster, longer swords
Artillery needs nerfing that isn't really inaccurate cannons
Claymores need to be faster
Shields need to be more fragile to bullets especially and in general
Have unfinished units have a sign not to be chosen
Combat in general is too slow, but it may just be the server
The fort needs steeper walls, so you don't just walk up the walls
Pikes need a minimum range
Pikes kill horses too slowly
Musicians?
Pikes in Imperial for Austist accuracy?
Cavalry swords are weak
Edit: the above is a summary of the points below.
Here's my feedback after the test event, in no particular order.
Pike bracing is utterly useless right now. This is an NW issue, but in this mod, where pikes and cavalry will clash a lot, bracing would be a really nice if it was possible to turn the pike quite a lot more before the pike is raised and useless. The Deluge mod actually has a very nice pike bracing mechanic where you press b and lose all mobility until you press it again to unbrace the pike. Combat is also really slow and unresponsive at the moment, but that may just be an issue of the server running on medium combat speed. Swords are also too short and too slow, you can't actually kill anyone unless you get someone from behind when formations merge.
Now shields. Shields are far too resilient to bullets. I think they ought to either break instantally on being shot, or be barely affected, because bullets are not going to affect a shield in terms of actually being able to block. They are also extremely resilient to general blows, I didn't even get any indicator my shield was damaged in some of the heavy fighting in the river. Claymores are too slow and the animation has them holding the blade, I'm summing this is an oversight due to being what looks like a re-modelled axe.
For the sake of players not being banned or playing as the wrong class, I'd recommend having placeholder or something similar to high light which units should not be played.
Also, while the fort we played was nice, it had the issue of the walls being climb-able, which made defending it near impossible and it's easier to attack than the defend.
I also found during the random brawls before the event that pikes weren't that useful in killing horses, I was taking at least 3 stabs to kill the horses of the cavalry that attacked me, to the point where I'd have been better off using a gun. I also found that cavalry swords seemed a bit weak, taking too long if dismounted to be a competitive weapon against the swords used by the line. I would suggest having it at a higher damage than it is now, but still lower than the infantry swords, with a slower speed and longer range to make it more useful while on horseback.
Also, are musicians an option? I'd quite like to have a drummer that would increase the speed or defence of formations, to make them a more worthwhile than the blobs we favoured during the event. Another less mechanical thing would be having pike length in Imperial, seeing as the Metric system wasn't invented for another 150 years, but this isn't important and may only be for the sake of the majority of the world using Metric now to describe a distance.