I'll count out arenas because they're the hot topic.I'd have to say alliance modes, as they're plenty stale, despite your progression being so heavily dependent on the likes of AQ. I don't do AW, but I see so many top tier alliance players lament over the current system.On that note, something that's always been stanky is how Solo-players practically have no options. It's do AQ or don't progress, basically. People with difficult schedules (, and introverts) have a high incentive to leave, which is a lot of money left on the table.Beyond that, the resource bottlenecks. The limiting (moneymaker) bottlenecks moving forward should be T6B, T3A, T5CC, T5B, and T2A. Catalysts like T4B, T4CC, and T1A shouldn't be an issue for anyone over Cav -- even if they decide to rank all their 5*s to r3. It's just silly.
Loyalty Store could use a update to be honest