XVM is the spawn of the devil itself, and make the people not play seriously, since they could see the victory chance and not even givin it a chance. I'll told you an experience_
Spoiler:
The other day on a Tier 5 battle on Fisherman's Bay, a XVM user tell us that we had only a 3% chance to win.
Surelly, the Enemy had 2 artys (2 priest), 2 Heavies (a KV-1 and a T1HT), and at least 3 sherman derps. I, on a sherman derp, was the top tier tank, we had a 3 tier 3 arty and several lights, including 2 crusaders. Half of our team was steamrolled on the 5 minute mark.
What happened?
The crusaders, the artys and I stood alive enough time to get the 2 heavies, and together we used hit and run tactics to show the enemy artys (who suffered the stormtrooper effect) enough time to our artys to get them.
The best part was when a M37, a crusader and me stood alone againts 2 sherman with gold derps and a T-34. The Crusader was the bait while I flanked the 2 shermans and killed them (one by oneshot kill, and the other got caught by fire) still the T-34 got him but our arty tracked him and I killed him with a well placed derp. The rest was taking care of a afk M8A1.
Demonstration that any team can still win if they coordinate well enough even if the chances are against them.