I feel Heavier Shot [Heavy shot has a 20% chance of making your next Straight Shot automatically Crit.] should be changed. Not because it's useless but because its both a dull and potentially harmful trait. Here's my reasoning:

Say Heavier shot procs:
You can do another Heavy shot, or Straight shot. If you:
Straight shot - you instantly crit, and refresh the buff.
If you Heavy shot - You can POTENTIALLY crit, and if that does crit you deal 10 potency more damage and saved 10 TP.

That said, generally procs mean an undoubted damage boost and something you should pretty much always be happy about, but in this case sometimes using your procs quickly (what I'd consider good/reactive play) can harm your damage... That's silly. Obviously in net it's probably a slight damage increase but for the potential that procs hurt your dps is just not very fun/exciting.

Suggestions I'd have made would be one of the following:
Either
[Heavier Shot - Heavy shot has a 20% chance to make your next Straight Shot deal 180 potency and automatically hit for critical damage.]
OR
[Heavier Shot - Heavy shot has a 20% chance to make your next Straight Shot automatically hit for critical damage and consumes no TP.]

I'm not here because Bards needs buffs or what ever, I'm just making the overall statement that this trait has a potential to be less DPS, which isn't very fun to deal with. Thanks!.)