I like the look of this way better than the dedicated commands. 4x MI Spear is simply unlikely to win a terrain battle against a determined opponent and needs to be in the terrain against almost everything. Splitting them up guarantees you can screen the main lines where it matters.
My book is packed so I cannot check, but can you really take the LH javelin as mediocre? That is pretty cool if you can, although be sure the 2 points are going somewhere worthwhile. LH that are already bad at shooting and are now afraid to fight other LH are pretty weak for 5 points. I am not sure what the 3rd HCav ordinary is adding. He makes it harder to order the full command on a single pip and I would not assume he will add many more flank opportunities that the other two, cleverly employed, will not. You could place him behind one of the other units, but if it is behind one of the other HCav it will just disrupt the group if you want to evade. I am not sure what you can get in the list for those points, but I would think about finding something else. Are you capped at 4 impact horse? More of those might be better than the non-impact.
You could also think about shifting one of the infantry command's MI into the Cav. Your HI spear will usually want to be deployed adjacent to each other and will not often be filling a gap between two pieces of terrain. That means two of the MI will risk being somewhat superfluous in most matchups. With the horse they allow that group to be far less worried about deploying near a terrain feature and can much more safely walk by it. The risk is if the horse go in a very open area and face a big pile of enemy mounted the MI will struggle to stay connected to your line and also struggle to perform well in combats. You also would want to downgrade the infantry leader to ordinary and make the cav guy brilliant to ensure control of both groups.