Every time I play Flood Zone all I hear is the annoying whiz of sniper bullet fire or DMR spam.
Console, or PC? Because when I play Flood Zone on Obliteration or Rush I don't have that problem. Because, Snipers are detrimental to their team. If they're camping the roof, they aren't arming objectives or going/stopping the bomb carrier in Obliteration. If they were on the ground or inside (which is generally the case for the bomb carrier unless they're stupid and not being in a vehicle outside) they can be a terror, sure.
Whereas in Pearl Market: Long sightlines on the ground, shorter sightlines on the roof but only ladders and like one stairway to get up there. The roof of last-set B is a notable example of the problem with Pearl Market You have a stairway to B or a "ladder" (which can be locked and can't be shot to open from the bottom) or you have to take a narrow "bridge"/forgetting the term for it and hop onto the roof because DICE didn't allow mounting if you overshoot the "jut" of the bridge to get there. Meanwhile they have 8-32 players up there to stop you from getting up there via those three methods. Two of which are coming from the same direction/nearly the same line of sight.
Flood Zone's problem with that is second set A where it's "indoors" and can be line of sighted via the hallway that nearly leads all the way down the buildings/indoors. But you can at least
flank that by going up on the roof and crossing over three or four ways to get the person camping there. I haven't seen the ability to flank effectively in Pearl Market.
As far as DMR's: Far more effective if they are on the ground and in mid-range to spam it, coming from someone that tortured themselves (these were good in the beta DICE, why did you nerf them!?) with three of them for the faction specific (Chinese/American/Russian) assignments that had headshots with the faction's DMRs assignments. Anyone using DMR's as a sniper rifle from a roof is doing it wrong.