Evolve: 7 Things Needed Before It Dies Out
4. Weapon Choices For Characters
Opposed to bringing out more characters, which come one or two new weapons each, why not just make two or three new weapons for each existing character? It'd mix up your original game with each character, and most importantly - increase the longevity of the entire game.
New weapons would have to be added, because using Caira's Napalm Launcher with Lazarus wouldn't add much replay value. Unique weapons for each character would of course change your play style, and create more challenges for players to complete.
The same applies to the monsters, as only being able to use the same four moves can be effective yet boring, and they should have a wider variety of moves to choose from. This would constantly keep all players guessing, and would increase the amount of entertaining fights opposed to sitting there like "Yup he's going to fly around and shoot level three banshee mines" like the majority of Kraken players do.