Hi sir,
I have thought up of a few suggestions, they are just minor but still if they could be implemented, they will make the hame more faithful to the movies at least.
1. First is about the nazgul. Since i have barely seen any scene where a nazgul on its fellbeast is ever attacked by archers or towers, they roam the skies fear lessly. Only hero like faramir should be able to attack them on fellbeast. And also fellbeast should be a timed power like invulnerability where the nazgul are imune to attack from archers and towers but only vulnerable to eagles and heroes for significant time. It should not be a permanent riding option. Also on fellbeast nazgul shoukd have there own plantir of powers like screech, wing blast, cripple strike (reminding of theoden), tail swipe, get down on the ground and fight like a dragon without fire with both teeyh and tail.
2.is it possible that rohirrim or any horse archer should be able to fire while moving, with lesser hitpoints and hitand run tactic or stance. Thats what they used to do in the movie.
3.gondor archers should not fire like normal archers because they didnt have any quivers through out the film. Instead they took arrows from a quiver carriers. And had immensely low firing rate. So for just better realism, each battalion should have a quiver carrier and attack rate should be reduced slightly specially in comparison to yeoman archers, rangers etc who have quiver but armour increased.
4.lastly strider upto the level seven that is before he turns to gondor, should have the option to switch between bow and sword.
5. One thing else, all weapon switching or riding abilities should not take precious palantir slots, instead the should have fixed slots like stance just above the palantir which should allow us to switch between any of the available modes. And the palantir should be now have a free slot available to add a new actual palantir power.
These are just suggestions, i hope you find them useful and dont mind my English i am not perfect at it.