To tell the offense "there is a trap on this door, if you trip it, you will die. You can alert the enemy team to your location by destroying it, or you can ignore it and move on."
He's not supposed to get kills with those traps; a lot of people seem to have this misconception about him. Kapkan is at his strongest as a roamer, setting up traps and stalking the enemy. Use your gun to get the kills, not the mines.
Anyone who has played Call of Duty: Ghosts knows how miserable it is to be killed by an IED, and those were cancerous throughout the multiplayer. Automatic explosives are not fun, and good lord was that thing the epitome of it. If Ubisoft Montreal removed the spike, here's what would happen:
- The attackers would run out of time looking for the enemy time while searching every single door for a trap, potentially exposing themselves while they do.
- People would die cheap deaths due to barricaded doors that look exactly like normal doors do, with nothing for an experience player to go by that would indicate "entering here is a bad idea."
- People get killed by enemies camping on the other side of a booby-trapped door, killing anyone stopping to check for a trap.
People will complain about all of these. And before you use the same frickin' "it's an IQ buff!" argument, here's a few reasons why that won't work:
- IQ's gadget only points out objects to her, and limits her ability to identify enemies clearly and effectively.
- Allies would have to have IQ manually point out each individual trap, or risk death to one of the reasons I listed earlier.
- If IQ dies, the game's pace slows to a crawl more dramatically than ever before. You thought losing Thermite was bad? At least you can come back from that; losing IQ would be the death of your team.
- It would force Attackers to pick IQ every round, and Defenders to pick Kapkan. Everyone else is basically as usual. Operators your team has to rely on like a crutch are not good for a healthy meta.
- If your team decided to split up, suddenly you've got one team moving at a snail's pace while the other is clearing with relative efficiency. That is, unless you decide to all flock to IQ, in which case congratulations, you all stack up on a single Operator; I hope you like nitro cells!
In other words, for want of a screw, the battle was lost.