Fixed amount of hybrid DNA per fusion
I’ve seen a lot of people who are frustrated by the current random fusions, especially when you get several 10s in a row. I really can’t see what the random fusions are supposed to add to the game, and I also can’t see how it would benefit Ludia (i.e. make players spend more money). The only thing it does is makes you get DNA faster than you deserve for some creatures and slower than you deserve for others. I think 20 DNA per fusion would be a suitable amount.
DNA rewards for walking distance
Like eggs and buddies in Pokémon Go. If you go for a long walk and the spawns are not what you’re hoping for, at least you will always get something out of the walk. From Ludia’s perspective, it may make people more inclined to buy scents because if the scent spawns are not good they will anyway get rewarded for the distance they walked to get double spawns.
Event themes based on the creatures’ real-world characteristics
Virtually all themes except special occasions are based on the creatures’ battle abilities. I’ve seen many people who find it repetitive when the same themes are recycled over and over again. Themes could instead be based on things like taxonomic group, when and where the creatures lived and when they were discovered. I’m not suggesting replacing the current themes, only to add some variation.
Fixed trophy gains and losses per battle
The current trophy system seems to be based on an Elo ranking or something similar. This makes sense in games where competitors near each other in the rankings play against opponents with very different rankings. But it is superfluous when you only play against players near you in the ranking, especially when the RNG plays such a big role that your chances are about 50-50 against any opponent that you are matched up against. It would make much more sense and be much fairer if you always gained or lost the same amount of trophies for a battle.