Something should be done about the large masses of people who deliberately arrive late to a meta just to take the daily chest reward. In particular, the Legendary boss at the Maws of Torment doesn't scale past a certain point and the dozens of leechers who wait by the spawn point don't wait for the people who did the actual work to catch up. I've had to do this with groups that only had 5 in squad and a handful of others. We had so few people doing the work that the squad had to participate in all 3 of the portal spikes. Yet the instant that the boss spawned there were 3 other commander tags, with what seemed like several dozen random people, and they took the kill before some of the meta squad could get out. (There were still leftover mobs and barriers in the lanes slowing people down.) It's especially noteworthy considering that without groups such as mine, pugs generally don't run this meta. There are people who, every day, maybe every 2 hours, are checking LFG specifically to see if there is a meta squad that they can leech from. They won't bother going to the Desolation otherwise. It's incredible.
Simple fix suggestion: Spawn teleporters from the realm portals to the boss area to ensure that those who did the work will get to participate in the big reward event. This fixes the most egregious problem of the only deserving players being deprived of the rewards.
Better implementation: Move the Hero's Choice chests to equivalent Crystal Desert Daily achievements, with each event in the respective meta a required objective to complete the achievement. This ensures that those who want the big reward will have to show up on time and help with the pre-events, which will help more of those events run in the first place.