clearstream
(He, Him)
The issues with Sharpshooter, especially in conjunction with Crossbow Expert, are well known (GWM damage at 120' away FTW!) As part of discussion about ranged in another thread, the following tweak suggested itself...
Sharpshooter v2
You have mastered ranged weapons and can make shots that others find impossible. You gain the following benefits:
Attacking at long range doesn't impose disadvantage on your ranged weapon attack rolls.
Your ranged weapon attacks ignore half and three-quarters cover.
Once per turn, before you make an attack with a heavy ranged weapon that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack’s damage.
Bolded are the changes. The heavy ranged weapons are Heavy Crossbow and Longbow. I would draw attention to the similar proviso in GWM. Narratively, it requires something meaty to power-attack: only the heaviest melee and ranged weapons qualify. Mandating heavy forestalls stacking with Crossbow Expert of course.
"Once per turn" ameliorates the damage in the most egregious instances of multiple attacks. It is kinder to the one and two attack classes than blunting the feat in other ways. For tier 1, it will usually make no difference. In tier 2, given the likelihood of some power-attacks missing each turn, it will often feel exactly the same as without. In tier 3 and 4, it prevents SS out-damaging GWM. Thus the all-in, toe-to-toe attack with the meatiest weapon possible keeps the crown of biggest sustainable damage to a single-target.
The damage for SS is still very solid. Rangers will still benefit considerably from taking it. It will still be great for Rogues who want to shoot from the shadows. Fighters will still do pretty appalling damage with it! But the feat becomes less distorting overall, and does not overshadow other strategies.
Sharpshooter v2
You have mastered ranged weapons and can make shots that others find impossible. You gain the following benefits:
Attacking at long range doesn't impose disadvantage on your ranged weapon attack rolls.
Your ranged weapon attacks ignore half and three-quarters cover.
Once per turn, before you make an attack with a heavy ranged weapon that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack’s damage.
Bolded are the changes. The heavy ranged weapons are Heavy Crossbow and Longbow. I would draw attention to the similar proviso in GWM. Narratively, it requires something meaty to power-attack: only the heaviest melee and ranged weapons qualify. Mandating heavy forestalls stacking with Crossbow Expert of course.
"Once per turn" ameliorates the damage in the most egregious instances of multiple attacks. It is kinder to the one and two attack classes than blunting the feat in other ways. For tier 1, it will usually make no difference. In tier 2, given the likelihood of some power-attacks missing each turn, it will often feel exactly the same as without. In tier 3 and 4, it prevents SS out-damaging GWM. Thus the all-in, toe-to-toe attack with the meatiest weapon possible keeps the crown of biggest sustainable damage to a single-target.
The damage for SS is still very solid. Rangers will still benefit considerably from taking it. It will still be great for Rogues who want to shoot from the shadows. Fighters will still do pretty appalling damage with it! But the feat becomes less distorting overall, and does not overshadow other strategies.