A simple rework that would both revitalize this perk a little, and rid perk pools of the highly undesired (and quite useless) Multikill Clip would be to simply combine both perks into one, with some slight tweaks.
Here's how I would change it:
• Rename the perk to Kill Clips
• Reloading after kills boosts damage, based on the number of kills
• x1=25%, x2=37%, x3=50%
• While the perk is active, decreases the number of kills required to advance it to the next tier
• eg, at Kill Clips x1, landing 1 kill (instead of 2) and then reloading will grant Kill Clips x2,
• Removed MKCs override, and allows the highest tier buff to persist upon reloading after a kill (though perhaps it should reduce the perks total duration by 0.5-1s after each reload if balance/perk competition is a concern)
• Adds a hidden Reload Duration Multiplier that scales with stacks held (each stack increases reload speed)
What you're suggesting sounds exactly like multikill clip, if they were to do you're suggested change they would have to also change that otherwise it would be immediately useless.
Edit: reading is tough for me sometimes my b