It is quite common at my level (low/mid-tier) to face opponents in (GAC/TW) that have a massive GP lead, this can be quite demotivating and often leads to just doing to bare minimum to get the participation rewards.
To alleviate this issue and to motivate players to continue to try in these event, I believe adding a secondary objective could help. In the same structure as the Krayt raid, I believe adding goals and rewards for banners collected (after the minimum banners for rewards has been met) could help keep players engaged even when they're completely outmatched.