Current Mamluk Horse
hit points: 149
body armor: 54
difficulty: 8
speed: 38
maneuver: 38
charge: 36
50,033
Old Charger
hit points: 130
body armor: 60
difficulty: 5
speed: 38
maneuver: 38
charge: 38
52,512
+19 hp, -2 charge, -6 armor, -2.5k gold cost. Not something I would call too much of a nerf.
Chargers saw more reduced armor because their role at charging groups of enemies were buffed since the max speed increased. A 13 armor and ~20+hp jump from the eastern warhorse/cataphract was a bit silly imo. Many other horses received larger changes than others since they were worse (barded warhorse) or better (war horse/eastern warhorse) compared to nearby horses, and overall have a more steady progression for charge, armor, speed, and maneuver instead of the large jumps seen before like 24->34 charge from the padded warhorse to the war horse.
It's unknown how the eastern horse will turn out since not many people even have one loomed yet. Courser turned out as expected. Against aware infantry, speed isn't a large influence, but it's great when dealing with/against other horses. Maneuver is good against both, and high maneuver+charge are pretty broken attributes to have together.
The partial respec not being enough is a very valid complaint, though. At the time, I thought that 9str + riding refund would've been too similar to a free respec. If one can make a good argument for why they feel certain stats are too low/high, I'm all ears.