I assume the idea of this will be easily brushed away by "ZOMG POP!!!! NERFNOWAY2ADD" But please put away those statements until the end of the idea (I hope at least 2 people make that quotation as the main subject of their comment.)
A sniper rifle with explosive headshots, small(around half the size of the starting gates.) which upon a headshot, deals the same damage to enemies around that target.
This would give sniper a good way of crowd control, allowing him to better soften up a group of enemies instead of picking off a single key target, which opens a new role for the class, which unlockable weapons are supposed to offer.
However, with the rifle comes a 25% damage penalty.
Meaning that a 150 damage headshot from the stock rifle will mean a 112 damage headshot from this rifle. So quickscopes are out of the question, as they fail to even kill lighter classes, thus further removing the ability to pick key targets.
A 450 damage headshot from the stock rifle will mean a 337 damage headshot from this rifle, just enough to kill a non overhealed heavy.
This would be an excellent counter to steamroll heavy r@pe that often occurs on bad teams in payload, which is where the idea had spawned.
The final part is this, there is a 40% longer charge time. So instead of 3.3 seconds to be at full charge, it take 4.62 seconds.
So here is the weapon;
level 8 sniper rifle
[+] Explosive headshots while weapon is at 50% or higher charge rate
[-] 25% damage penalty
[-] 40% longer charge time
What do you think?