First off we all appreciate your testing, but no one owes you anything man, gotta drop that attitude it will only lead to disappointment. Not one single person, even mex, gets every change they want because the vision is in the big boss mans hands (who no longer joins us on the forums). Most of my ideas and things I've tested about aren't accepted, and that's completely okay and understandable.
Keep testing, show them what you find and maybe they'll listen, but stop the "you owe me because I tested". It doesn't help prove your point.
As far as your 4 "nerfs":
1) Herd Penalty was non-existence before, the current 2 horses per troop limit is completely reasonable.
2) This perk should be deleted and players should just have the option to trade/purchase fiefs from the start for a ridiculous price. (don't put trading fiefs to recruit lords behind a perk)
3) Is this even true? I still get days where my caravan can hit 1k profit
4) Its the exact same until you get past 1 million, and its a passive income. How in the world does this ruin trading? 1k gold a day is still huge and basically a free caravan or two, do you really deserve more than that? No. Also its suppose to be an investment, but you don't even sacrifice your gold or have any risk of losing it. Doesn't sound like a real investment to me. If you were handing over your gold to a towns "bank" (with the risk of losing it if the town is taken) for a higher daily income, then this would be different. Instead you just get free money with no risk of an actual investment.
Also no one said you trading to get fiefs should be comparable to fighting for fiefs. It is a fighting game with trading, not a trading game with fighting. So of course you should be able to fight for 3 towns before 1000 days, buying 3 towns before 1000 days is just cheesing the game.