So, just out of curiosity, I came back and started up a new CKII game for the first time in a year-and-a-half to two years, and decided to try out some stuff from Horse Lords, as I had always enjoyed playing Tengri nomads. I noticed that the Latin Empire bookmark now had a younger Temujin, and thought it would be a perfect place to start and see if I could replicate his historical successes from 1204 onwards. Well, I immediately realised how ludicrously limiting the game had become. Maybe I just have no idea how to play anymore, and particularly don't have a grasp yet on the intricacies of the new(ish) nomad mechanics, but tell me, does my experience sound accurate for the current state of CKII?:
Immediately, I found that both my adult sons needed wives, yet only a single marriageable woman existed in the entirety of the Khanate. I married one off, but since she was a commoner, Jochi immediately lost prestige and ceased to be my heir, after which I presented a debutante (didn't realise Mongols used French soiree balls to marry off their sons) and now my second son's prestige tanked too, evening the two out and restoring Jochi as my heir again.
I immediately took a +3 martial focus, and went to the new "horde" army screen, and was only able to support, both financially and based on horde population, one additional horse archer horde of 250 troops, boosting my horde to 750 troops. Although this seemed extremely small based on my experience with the old state of the game, I was willing to give the new system the benefit of the doubt and thought perhaps Temujin's extreme martial skill would balance out my relatively low horde numbers.
I then attempted to declare war on the Khanate directly west of me, and was surprised to see that the only CB I was allowed to use, was a single-county conquest. Although, I was an unreformed pagan with no access to holy wars, and neither would I have had access since we were both Tengriists, I was still surprised that I could not engage in any larger-scale wargoal, since a single county conquest would hardly provide me with the conquest speed to match my historical counterpart.
After riding forth to battle, I received an unpleasant reminder that I was now playing "EUIV: Mediaeval", as the ping-pong battle mechanic clicked into place. Although it was somewhat frustrating, I was still willing to give things a shot, and began preparing to chase the enemy horde around his lands for the next several months to a year. Within only two-three months, I was suddenly attacked by the Khanate directly south of me, in a much larger wargoal to take every one of my counties. I prepared to defend my lands and rode back home, only to meet up with a 1250 man horde, soon to be bolstered by an additional 420 troops just south of us, made up mostly of light cavalry and horse archers. I thought perhaps again that Temujin's 29 martial score, coupled with my higher proportion of horse archers to return the battle to the skirmish phase (as used to happen) would be enough that my 750 men coudl secure at least a difficult peace.
Well, it turned out that I was dead wrong. Within only 2 battles (well, one real battle, and one slaughterhouse event) my entire horde was stackwiped, and a few months later my grazing lands were completely occupied with -100% WS, and I was resulting made unlanded, and received a GAME OVER.
Now, perhaps I'm simply clueless at how to use post-Horse Lord nomad mechanics and made a fatal error overlooking some option to acquire a significantly larger/better-proportioned army or utilise horde pact diplomacy to survive, or perhaps I'm just a terrible player, particularly being thrown into completely unknown circumstances, but does it not seem odd, that Genghis Khan is situated in a position, only 16 years from the "Mongol Empire" bookmark, in which he neighbours multiple significantly superior Khanates and can be instantly wiped from existence by a single war, albeit by a player clueless to the new mechanics?