by taking two people under overshield as you spoke of, you pull away a net and take two people from holding ground; plus they're focused on a single objective; it's one thing to tell people to focus on a sniper, it's another to tell people what to do~ if they follow through, it can cause more problems than it's worth.
Complaining, although it can be excessive, can also be something as simple as, "Gawd! they always have a guy camping in the back with a sniper! he keeps killing me before i can get him!" plus or minus some more colorful language, it still tells the entire team at least three things:
- they are camping their sniper in the back of their base
- our sniper is frustrated
- their sniper can do damage and is capable
which says somebody may wanna switch with our sniper if for no other reason than to give him a chance to relax, somebody should flank their sniper, or we should control down low and push through to their side from below, hoping to catch them unaware~ then catching the sniper as he chases flag.
Plans, although they work better with teamwork, can also lead to a full team dieing from a failed plan~ which is a huge gamble. It's far safer to test some part of your plan yourself, and if it seems plausable, fill people in while you're dead or in motion. no reason to gamble before you think you can handle at least your role well enough to hurt them a bit should your team miss the chance.
And rather than talking about power weapons, i'm talking about line-of-sight and perimeter. It's amazing what a team can do when backed into a corner, even against superior teams they can keep a flag from moving more than a step or two in their base per attack~ when you ask people to move out of their positions, you're on the attack. You're the one who can be surprised more easily than before, and against a superior team it'll cost you. You can find your team scrambling to catch up and recover, as they already grab and begin running your flag while you respawn.
Whining is only a problem when it's repeated, as you said, 5 some odd times; especially if it's about connection issues. That's best solved outside of the game. Talking about in-game stuff though can stress the point to other teammates if it's happening repeatedly..such as needler hopping on narrows, and nobody is killing him. Hearing how stressed a guy is can help let the team know to give him a different role if possible, to aleviate his stress and help him get back into his "groove".