I think this discussion has happened before. In that discussion it was mentioned that when at beginning of game, bounties are meant to be finished along with bunch of players, which is understandable since we had level cap of 70 and before that players base power was lot less. Now more and more players are capable to one round hunt the bounty. The dev mentioned the solution could be increased HP. The problem still persists and this requires attention.
Call or not, what problem persist is entering bounties without if knowing if other player is going to enter at same bounty or when you do you enter with a top notch team, only to take out 300k odd damge. This is issue and hence we need to call in chat.
I know it is weak proposition because out of 100s of alliance, about 150 of them will actually care about it. In my previous comment, I put emphasis on summoning, which is taking toll lot more on individuals than giving rewards to Alliance. Times have changed, players have grown stronger, objectives have changed for alliances, things definitely need rework and tweaking.
PS: I would urge players to focus more on ‘what our problems are’ than ‘what solutions we want’. Let devs know our complete problem than just shelling out suggestions. We are just players and they have only one job - to improve our game experience. Our suggestions have to work through game mechanics and other chunk of things we don’t think about but devs have to think about everything, even about unfair advantage it might bring in game which we never thought of (don’t know if their can be one in this case but top alliances will have more fight if call be a open facility to every alliance).