They need new game modes.
I don't know about you guys, but trying to get the event characters is the only main reason I'm still playing. Rovno has had plenty of time to decide what any new features should be, but keep making new characters that cost to much.
I love Transformers G1, animated, prime, and robots in disguise, so I am a bit disappointed that no new modes were added. I am a total nerd when it comes to this game, and I brainstorm new ideas daily(anyone else do that?). My best idea so far is to add a battle mode, player vs player, used the TFs you have. You can choose one on one, two on two, or five on five. The TFs would either be in an arena or a normal map, except without obstacles or pigs, and just try to destroy the other.
Other idea is to add a campaign mode, even there sort of already is. But in this version you have cutscenes, one on ones, bosses, and can unlock the event TFs, you still haven't unlocked. Imagine taking an episode from G1 and fusing it with Angry birds. And then in the end, unlocking a character who was in that episode.
If you guys have any ideas, pls leave in comments. Also tell me what you thought of my very flawed ideas.