How the new shards regeneration works is as follows: The cap for how much energy you can get was decreased. How many seconds you get (0 counts as a full second in this game) per hit/kill was increased. So the cap before I think was full super or closer, it was just hard to pull of as you had to kill a lot of things. Now its probably around 75-80% cap but you get more time for hits/kills. Its still great and you arent losing much