Approaching and Challenging

Random ordinance has totally messed up approaching and challenging selective gunfights. I say this because if a guy on radar is on the other side of the wall, in normal Halo I know if my teammates have shotty, sniper, rockets, etc. I would challenge this.
In this game I have to think about different scenarios.
A.) Does he have a shotty/scattershot from ordinance
B.) Is he bolt shotting
C.) Does he have rockets from ordidance/Inc Cannon

A few others could be plausible but you catch my drift. In no way should I have to think about all these possible scenarios because I should know where the power weapons are and if we have them. Random ordinance breaks this concept completely