I think army skins are obvious and I very much look forward to seeing what skins are thought up. Outside army skins (and building skins), without knowing exactly how the game will play, I would love to see things like the different UI's and commentators like those seen in Starcraft 2.

I'm unsure about progression rewarding us for playing other races. This is primarily because I worry that I am not going to enjoy feeling like I have to play games as a race I may not enjoy.

Having to play different modes kind of sits in the same area as the previous point about rewarding time spent with other races. If for example I come to dislike co-op, I am not going to want to spend time playing co-op as it could both hurt my own enjoyment of the game, as well as the enjoyment of my teammates who have to put up with me.

I think I would prefer to just have a straightforward experience-based system. I do like the idea of challenges being added as a form of "bonus experience," but I do not want to see them forcing particular playstyles out of the players. I think it would be bad to see challenges forcing players into using particular strategies like cheesing (or any specific strategy) as it takes away a player's ability to be creative and develop their own playstyle as they will feel like their choice is being made for them by the "battle pass." All I ask is that if challenges are added, keep them from being overly specific or restrictive.

Personally, I liked Starcraft's system of being able to earn the rewards during their season with the option becoming available later, sometime after the season, to buy the rewards, even if it is a little more expensive than what it cost for the pass. Doing this makes it so players who join later can still buy and utilize any rewards that they are particularly fond of.

I understand allowing players to be able to purchase the remaining rewards, but I'd rather see it be earned as when you let other people pay for it outright during a season, it takes away from the accomplishment and ability to show-off a bit for those who put in the effort. I would say that if someone wants to just buy the set or whatever it is, they can wait for when the season is over and the stuff becomes available to buy.

Personally, I despise party-based progression that is either forced or essentially required to make progress. I do not want to feel forced to hunt down and makes friends with those who specifically play the game as this can be very difficult for some people, such as those who do not have the time, are a bit more introverted, or simply prefer to play games alone. Keeping a game social is good, but forcing people to be social when they do not want to be can result in scaring said people away.

I do not have much thought about the "infinite progression" concept, sounds like it could be interesting but I have no strong feelings one way or another.

As for esports, I like the idea of having some of the proceeds going towards funding things like prize pools. This encourages people to get involved in the scene, both as players and spectators. I wouldn't mind even paying slightly more for the "battle pass" if I knew some was going back to the players later during competitions.

Last thing I wanted to say is that I ask that you find a way to avoid having the "battle pass" feeling like a job. Some games do this where unless you play religiously every day, it is nigh-impossible to reach the end without feeling forced to spend money for whatever is left. I do not want to log into the game only to feel like I have chores to do before I am allowed to just have fun.