Perhaps why not make a "you can't have your cake and eat it" exception? where only one of the two changes actually happens? I personally pointed both things, because they are the two things that bring merc attention - ease of use and payment. Didn't mean both should happen, in fact just one would be enough to bring a bit more mercenaries on Liberty's side in my opinion instead of scaring them away into the Reavers/LH/Rogg bounty boards.
Now that I'm actually registered on the Lib board I couldn't really care less for myself, I never played for the money and the paperwork is already done to some extent, I just need to post all the pew every once in a while and get a paycheck. Though others aren't like that, some actually merc for the money and considering how there's a bigger abundance of lawfuls than unlawfuls in Liberty, grouped with the annoying requirements of keeping a ton of different warring factions hostile and low pay, might just send them to the rogue board for hunting ln newbies.
Also I'll leave you an example of the flaws of requiring all the factions hostile:
And as much as I try I keep having the xeno rep popping into neutral. As well as that I have given up on keeping the GRN hostile (shooting depots and NPCs) as it'll get the outcasts neutral again and that means the xenos will be neutral again once I shoot at Cali Base enough.
Now while most (maybe just not the lawfuls) are easy to keep at bay for a BHG ID that has rep adjustments, the FL ID is a free for all on any and all reputations.