1.) exchanging is normally the play here because it takes less time than 4 maning over and over again to get the force and has a higher success rate. exchange and try to push them back with ur uber so u have better positioning in the post, any player exchanges during or after the uber are good for ur team because u have faster spawners. make sure all of ur players are healthy before u do it and ur flank might wana do something behind the uber as well.
2.) you probably shouldnt run sniper when you do not have the point because the other team can just play the angles so ur sniper doesnt matter. when u do have the point, especially on a map like product, sniper is very powerful if he hits his shots because he can deny literally the entire map. on maps like clearcut and bagel i do not think sniper is very viable.
3.) when u are pushing the point on clearcut and the enemy soldier jumps behind you i would say that the right play is to turn around and kill him because his respawn timer is like 12 seconds or something when his team has the point.
4.) demo watches left, soldiers watch the 2 left doors med plays in the saw room scouts do whatever. there is no real forward hold that is as good as it is on product or even bagel, but its more like a forward pressure. especially if u have full ad u can kinda catch them off guard with an uber if they just take yard thinking nothing will happen.