Might you benefit from re-rowing your bars? For example, I only use numbers 12345 and sometimes 6, and 0-=, so my bars are laid out like this:
Code:
[1] [2] [3] [4] [5] [6] [0] [-] [=]
"bar 4" altshift 2-1 2-2 2-3 2-4 2-5 2-6 3-1 3-2 3-3
"bar 3" shift 2-7 2-8 2-9 2-10 2-11 2-12 3-4 3-5 3-6
"bar 2" alt 1-1 1-2 1-3 1-4 1-5 1-6 3-7 3-8 3-9
"bar 1" neutral 1-7 1-8 1-9 1-10 1-11 1-12 3-10 3-11 3-12

So even though it looks like I'm using four full bars on my screen, I'm actually only using three, and what the game calls bar 1 looks and feels like the 1-6 keys of what is visually bar 1 and bar 2 on my screen.
I know it's a pain to reconfigure when you already have everything how you want it for the vast majority of the game, but there's probably some row configuration that'll let you still use the exact keys you want on the same visual layout that you want, but that leaves your most-used keys bound to what the game thinks of as bar 1, and you'd only have to do the big reconfiguration once. There also might* be macros we can use to automate the reorganization of your old bars into the new bars so you just have to press it once on each job to get everything where it's supposed to be in the new configuration.
*For example, if your most used keys are on bar 2, macro swapping bar 2 with bar 1 on every job is a fairly trivial matter. Then the only things you would have to manually do are swap all the binds for bar 1 and bar 2 and swap their layouts in /hudlayout. And after performing these swaps, your UI would function exactly as it used to except all your future RP fights will use your main bar instead of an awkward bar. A more complicated rebarring (e.g., combining two bars into one so that game bar 1 acts like two of your current bars) would be more annoying because half of each bar would have to be copied manually but still only something you'd have to handle once for each job.