QuickIntro: I play this game since 2014, I dont play any other Supercell game. My suggestions are based on a long time gameplay, I'm happy for the updates the devs brought, since they respected the native balance on the roots of the game.
1st. Sug. = Buy Extra time (ET) with GBE during a battle, this option would bennefict the slow troops, greens / tanks, as a gamer of them both. Since I have 3 acc. maxxed out, this option, including the TF OPs would be very much welcome and necessary.
In this sense:
R.M. (Rate multiplier) = 3.:
GBE / ET
3 x 5.5 sec.
9 x 5.5 sec ...
2nd Sug.: Since we had Warships, I feel like this 2nd Sug. wouldn't bring a new season feeling upgrade. But I believe this should had been implanted many years ago.
QI: The Task forces are the reason I kept playing the game, back in the old days the game was very limited, simple but hard, the TF help and the op reward's was very important to a rookie get his base growing and the basic mechanichs understanding...
So my suggestion would be: Take a special look at the TF, since it's the way to keep this game addictive and more pleasure.
In my opinion the Task force would need a TF Vault, which resources cannot be withdraw by members (not even the Leader). The TF Vault would bring thousands of possibilities to the game, like, Why do my TaskForce would need a Vault?
A vault could be filled with some resources like Gold and Ores (not wood); With this resourcers you could buy Intel and some offensive prototypes or buffs, like the ones we see on events or war ships. This is a group effort maxxed out in a TaskForce.
And maybe, one day, we could have Taskforces War, because why not?
Task Force would have resourcers and Taskforce have TF Points, the ingridients for a battle (Like LVL and VP)