The fact the game is Smash Bros inspired on the combat but adding their own flavor makes it appealing.
Look at this combo vid.
The team has bothered to put an
Advanced Combat Mechanics Guide which usually a lot of developers wait til later to put guides. It shows enough of the ideas behind the game and you can see them answer questions about the game on the community and it seems they will take on feedback and keep the game flowing with content and fixes for the competitive aspect of the game.
BTW Friendly Fire is on but can be turned off but the developers dont like it cause it cheapens the game and make it into another mindless hack and slash instead of playing with style. (You can look into the community stuff which they talk about it)
Overall I like a lot the game and the passion the team shows for the game.