An argument was made that Imp isn't just about going to war, it's about building an empire. That is why I think more of the +2xp idea as it allows for both peaceful expansion and conquest. The GG increase only works when going to war, which I have no problem with, but the bonuses that you get from the GG's hardly help it compete with traits like Charismatic. Heck! Charismatic benefits from GG's more than Imp does anyway! +2xp per unit just gives an overall stronger military from which to build - or conquer - your empire.
Maybe a +2xp and a +100% GG bonus?
Or maybe, just maybe, actually having a true +100% GG bonus instead of the current (approx.) 30% GG bonus. If the GG's were liberal with the Imp trait, all would be well as Imp would have it's own niche in the game. Hmmm.
Well giving 2XP to all units seems a tad overpowered, combined with 100% GG, when you consider the fact it's more powerful then aggressive because you get to chose the actual Free Promotion itself, it's not like Agg where the Free Promotion is Pre-determined and imagine how overpowered the Warmonger combinations would be like
2XP to Imp, Julius Ceasar with Free 2XP Prats, that's even more overpowerd then Aggressive Prats
How About Agg/Imp Khan with Free 2XP, that's an automatic 2 Promotions to all Melee and Gunpowder units without the need of any buildings or Civics
and Cyrus.... Well you get the point I guess...
If it were Free 2XP to a units it'd have to be specific units, maybe mounted and Siege, but then you have to worry about not overpowering the UUs of Russians/Mongols/Persians...
I can't think of a Way that would make 2XP be balanced, I think it's a safer bet just to give them a specific free promotion, for balance purposes like free Flanking I to Mounted and Siege Mod I Posted.
Btw I found a way to get a <iWarWearinessModifier> but requires us to use this CvGameCoreDLL.dll from this mod.
http://forums.civfanatics.com/showthread.php?t=207938
I've already Modded in the WW b onus but I'm having problems getting the Cheap Jails, it won't read the BuildingsInfo correctly, for some reason whenever I attempt it it removes ALL UBs from the game :S...