Ehm... why? Because you say so?
Avoiding a triggered mine is not any different than your usual moving, running, jumping etc. when you can just roll backward/sideways.
Mines have never been in Uncharted MP and it completely changes the way you play. You have to be on the lookout for something that forces you to play differently than the maps want you to. Want to swing around on the ropes? Better check your landing spot first before you jump off (kills your rope momentum and/or requires a re-swing). Want to go down that slide to flank an enemy? If there's a mine on the slide, it's not happening.
So you're either forced to abandon the fast-paced, traversal gameplay, a hallmark of Uncharted for six years, or equip a booster specifically designed for mines and C4. Is it possible because you're given 26 LP to work with? Absolutely. Would the game have been better off without them, or adjustments to them? Absolutely.
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Grenades: If you throw one, your location is exposed, or your throw could miss. Risk/reward.
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Smoke bomb: If you throw one, your location is exposed. Risk/reward.
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C4: If you want to get a down, you have to be near it. Risk/reward.
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Mines: If you place one, you can go clear to the other side of the map or to your teammates with no consequences. The only downside is the enemy might be revived by a teammate.
A fair compromise would be something like if you down someone with a mine, the enemy is marked only to you and you have to KO them within 15 seconds or the KO doesn't count (they still die but it counts as a suicide instead). Or, you get the KO but no cash. Something can change and still keep mines in the game but make it more in step with how Uncharted is supposed to play.