I don’t know how often you play Whiskey… but the Scrap Cannon is way harder to aim than the sticky.
First off, the sticky has a yellow arc showing you where it will go. All you have to do is aim at a foe and hope he doesn’t move. With some practice, it’s easy to figure out when your foe is about to stop moving for a few seconds. The Flak Cannon on the other hand is much harder to land. Second off, you can’t just say “oh it’s easy to land at close range and therefore it’s easier than the sticky.” The sticky is easy at close range, too. The sticky is super easy at close range it’s not even funny. The Flak Cannon is easier to hit in medium range than close, in my opinion. Because it spreads out quite nicely after a second. At close range, it is misleading, it does not fire quite at the crosshairs, it’s a little off center. If you fire at someone in point blank range, you aren’t going to miss, but you will hit very low. If you are aiming for the head you will get a chest shot.
I know you’re sitting there thinking I am bullshitting you, but I’m not. I’ve been playing Whiskey a lot. His Sticky bomb is much easier to use than his Scrap Cannon which, for some reason, is more difficult to use than you’d expect.
In addition to this, again, it never occurred to me that the grenades were on different buttons. If they fixed this prior to release, that’d be fine, if they fixed it now, I’d be annoyed. Fix Oscar, not Whiskey. I am not lying about the burst rifle either. When I was playing Oscar I was just pressing that button over and over and kept having to remind myself about my automatic RoF. My grenade, on the other hand, was never mistakenly used, though, I did JUST switch to Quick Fire Mode and I was missing with it a lot because of that.