I think you are misunderstanding the reasoning behind team levels, Daniel Fonda. Mobas are about team play, not solo play. The issue with hero levels is that it doesn't force you to play like a team because you can just spam farm experience by yourself while not really adding anything to the team, only caring for yourself. Blade and Soul Gold That is bad moba player mentality, and it is the reason hots uses team levels. It encourages team play, and makes experience farming a team effort too.
Jesper Thuesen Props for a constructive, well worded comment (y)
Although I do have to point out, while league and moba do require solo EXP, farming and put importance on your solo play, neither of those games can be won as an individual player. At high level it does comes down to how good is a team, due to importance of objective control, rotations, map control and map pressure, wave control, etc.
The fact that you shouldn't lose a 1v1 and that you need to be able to cs, control your waves, etc. is just a baseline for a masters level player (no, not even challenger).Truth be told, MOBA games live or die based on their esports scene,Buy Blade and Soul Gold as well as how tempting it is to get really good at the game and compete on a professional level. HOTS never really appealed to the pro's or intermediate players, due to Blizzard's confusion about their own games.
If you check the trend lately, all games are being marketed as wacky and casual, while being pushed heavily into the competitive scene. Most of said games would have done better, by just focusing on one of those.