I'm also playing with the fact that you can map button chords, so I've mapped B+Y (or circle+triangle) tap as "switch to heavy" to be able to instantly pull out heavy on a gamepad like you can on a keyboard. Seems to work well. Still have an unmapped B-tap though.

I've thought about leaving tap-B unmapped since i rarely used crouching anyway and may just use it as a chord button for use with other buttons, which could get interesting or convoluted very fast. I rarely use B as it is because I use legacy sticks (left stick: turn left/right and move back and forth, right stick is strafing left/right and looking up and down), but even getting to B on regular sticks would mean not aiming while I'm hitting it, so.. yeah.

The fact that it's not just regular remapping but also the ability to also remap it via being a tap, double tap, or long press does open up options.

Anyone else come up with interesting remaps, or improved your accessibility with the feature?