Imo concentration isn't the issue. The issue is how easy it has become to get and maintain boons on a short CD (even without alacrity).
There was a time where you needed to blast firefields to get most of your might. Now you trigger a chain of passives with a utility skill and get "rewarded" with 12 stacks.
Lego armor takes you either 22 or 29 weeks for the tickets depending on which skin you want. Ways to get them faster or more would be a really nice change.
Sadly there is no report option for leeching, so botting it is . Funny how some think that only PvP breeds toxicity, while festivals that are meant for fun do just as much.
Healing Scourge relies on Lifeforce to use transfusion/barrier. Spear is better for generating LF if i remember correctly. Best option is to cycle through both weapons to keep up the damage/utility. But it's underwater combat so.... :/