If you wouldn't mind when you have the time I'd be much appreciated. Usually interested in seeing what other people's bars look like on controller anyway as I have seen people come up with some interesting solutions. I have seen some people are able to swap bars with I think L2 and R2 so I might try that at some point.
As promised. It's worth noting I have my crossbars set such that flipping between primary and secondary bar and back is a single tap of R1, and I'm switching between L2 and R2 constantly, so macros wouldn't save me anything and involve finding yet more space I don't have.
Main Bar:
This is basically all of my normal frequently used stuff. I default to holding R2 down, so I have my main 1/2/3 buttons on R2+Face Buttons, and then Lead Shot on triangle because... I always had all my bard dots on triangle so that's just how I roll. My self-buffs are all on L2 and face buttons, where they're easy to get to while moving (my opener involves mashing a bunch of them as I run in on pull.) Hot Shot is kind of a self-buff so it's there too. Reload, Quick Reload, and both of the GB oGCD damage buttons on L2 and d-pad. Heartbreak, Reassemble, Wildfire, and Head Graze on R2+Dpad because I wanted them on the primary bar and they don't really fit with the other things. Head Graze is here and Blank is not, because I'll always use Head Graze but only use Blank in melee range. I can get through pretty much any non-Savage fight with just this and my extended bars. If I were starting over I'd probably move L2+Dpad to R2+Dpad and vice-versa, but I'm used to this now.
Secondary Bar:
L2 + DPad, R2+Face buttons are a direct copy of the primary bar. R2+Dpad is almost the same, but with Potion swapped in for Heartbreak and Blank in the place of Head Graze. L2+Face Buttons is all my 'stuff I only use in specific circumstances' stuff; Rend Mind and Dismantle (which I continue to believe will be merged into a single skill and button), Leg Graze, and Suppressive Fire. Up until A3S, I actually had Hot Shot in its spot on this bar too, but had to make room for Stun and Slow.
The key for me with the secondary bar is I can swap to it and stay here for quite a while--I don't have to swap back to primary bar until I want either Hot Shot or Head Graze, so there's no frantic bar-swap for an oGCD and swap back. With MCH after getting Gauss Barrel, you have cast times fairly frequently and so it's basically free time to bar swap since you can't do anything else at the time. If I fail to bar swap for whatever reason, unless Hot Shot is falling off, I just keep doing what I'm doing and swap on the next GCD. The goal is to never be stuck in a situation where you're pushing out your GCD getting to the right button.
Extended Crossbar (L2+R2/R2+L2):
So I'm lazy and don't want to have to differentiate in press order most of the time. The only difference here is the AOE, because I like being able to choose between the slightly stronger AOE that uses more TP and the slightly weaker AOE that uses less TP. Otherwise the layout is identical. This is just miscellaneous stuff that I want access to easily and immediately, but won't spend a ton of time switching between options here. Hypercharge I hit once every two minutes, Rapid Fire every 90 seconds.
There are a few things I absolutely never use (Turret Recall, the bind) that aren't mapped. If I needed them for whatever reason, I could either sub them in to my situational L2+Dpad on the secondary bar, or replace some of the longer-CD stuff (Reassemble, Ricocchet) on said secondary bar.
I also have a bar to watch CDs I can't see on my primary bar, but there's not a ton there:
Hypercharge is relegated to extended and Pot and Rend Mind are on my secondary bar, so this is so I can watch them. Disassemble shares a CD with Rend Mind, so it doesn't need to be watched separately. Technically I could add Rapid Fire and Blank here, but Blank gets popped the GCD after Head Graze if I'm in melee range, and Rapid Fire is up whenever Hawk's Eye/Wildfire are, so I don't watch them separately.
There's a lot of room to move stuff around in a way that makes more sense for you, but it's pretty easy to fit everything you need frequently for MCH into a main bar and extended, and pretty much everything you need ever onto a secondary that can be swapped to when convenient. I have LB relegated to a bar that doesn't come up in normal rotation, because MCH LB is pretty terrible and will basically never be used in the course of normal event (it does less damage per target than any other LB.) If I need it I just manually flip to the bar since LB animation lock is forever so I'm not going to be going all-in on oGCD mashing at that point.