I have noticed some odd things regarding equipment.
First one is regarding the pike, which has the name of a long spear wielded by infantry but has the description and image of a halberd, requires less time to train than spears, and can be wielded by cavalry.
If you mean a pike which becomes a lance in the hands of cavalry then the image and the description should be fixed. I'd also say that it would require more training than a spear.
The pike becoming a lance should also considerably change it, since it shifts from defensive and charge-countering to its opposite. It also requires more training.
If you mean a halberd then it has no place on a horseman. Same if it is a pike which does not translate into a lance.
If you mean a generic polearm, then we have the first scenario, but with even lesser requirement for training. Most polearms were improvised peasant tools.
Second one is regarding the spear, which is derived from the concern about pikes. While you can argue that its higher training than axes reflect the fact they are less versatile tools in daily life (only for hunting, opposed to axes, or swing weapons, which had more uses), you cannot deny the difference is small, and that spears were widely used throughout history and before. When considering short spears, you can hardly go simpler than that.
Third one is the javelin: one of the early skirmishers' favorite. Despite being an extremely simple weapon, for some reason it is set to be built at the same level than swords. They should be available earlier, not unlike the like the spear and axe. In fact, if the pike is actually a halberd, it would make sense to switch it with the javelin on the building it is made from.
Forth one is the shield. Very versatile and quite widespread, this generic category fits almost anywhere. Almost. It has no place on a polearm-wielding soldier, and even less on an archer. Those should not be compatible.
Fifth is the longbow, which should not be associated with horses. Mounted archers, in fact, should have an increased training time, for it's certainly not equal to the separate times of bow and horsemanship training, but a (very powerful) skill into itself.