about the art - a system similar to steam workshop for art would be interesting.

matchmaking - isn't the problem with current matchmaking is that nobody uses it? that system is dependent on players using it, and with such a niche game, it naturally struggles.

new player experience - yeah, it's an issue that has existed for as long as the game has existed, and there are several improvements (such as the new tutorial, which is still confusing for new players imo) in current TB which might transfer to mext.