If you can compile it, I can add a cvar for gameskill so ones that wish can run a customized difficulty - assuming fretn is fine with it?
Although custom skill would require full patch all around, a fast hack to offer change can be introduced for time being in repository so anyone that wishes can compile it, till the next release where naturally it should be patched on all ends to correspond in menu etc..
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EDIT:
Here's a nasty patch for anyone that wishes to use it. Just apply it and compile your bin and you should be good to go (didn't test it but should work).
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New options are:
g_customSkill | 1 = enable it, 0 = will use default game skill set (easy, hard..)
g_customSkillAim | Value between .1 and 1.0 for AI aim level
g_customSkillAtt | Value between .1 and 1.0 for AI aggression level (attack)
Post's attachmentscustom_diff.patch 3.16 kb, 5 downloads since 2013-10-26
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