I'd like the competitions for species on free rotation to be separate for guests and members, I think this would benefit both. For guests, all 7 competitions for each species on free rotation could last just one day so they are all covered during that week.
I'd like to see more competitions split into tiers, like Elite, Intermediate, Starter.
I like hunting alone, so I'm not happy with competitions for Mallard/Canada Goose being multiplayer only. That would be justifiable if there would be introduced team competitions, but not for individual ones.
I'd like there to be integrated support for community competitions, so that they could be accessed by players from the official interface and the prize transfer would be automated.
I like simple competitions with common sense rules, not the ones with weird rules. If the integrated support for community competitions would be implemented there would be ok for the organizers to set the rules they like, but official competitions should address the vast majority of players imo, not just niche ones.
I don't like competitions which consider only the first x harvested animals (requiring in fact to leave dead animals on the ground), the ones for total weight and the ones requiring several animals (both of which are grinding competitions imo, you can win only if you can play for many hours). To fix this I would suggest introducing a rule like "only animals harvested in the first x minutes/hours of play with the competition activated are taken into consideration". In the first case, this would of course replace the "first x animals" rule. This way the competitions would be appealing to more players, including casual ones.
The range competitions could be more appealing to players by replacing the longest shot requirement with the best score/weight of an animal shot from over x meters (e.g. over 150 meters), or under x meters for short range ones (e.g. under 15 meters).
EDIT. And for new species, please introduce the 2 standard competitions from the release of the species.