Ok, so here goes what i think it should change in the game overall.
I've played many thardferr versions so i say what i belive were good on other times.
Keep in mind that every race has limitations, but in the end usually a human wins, or most of them are on the top.

Make the medical centers usefull. We all love making troops and we all get very upset when we lose everything. Make it so with 1 MC per land you can revive up to 50% of the army. If you are the attacker, the troops revived will come when your army returns. If you gate, they will come when the regular time army arrives. If you are the defender, they will come in some tics, some every tic, maybe up to 10 overall. This will grant, both the attacker and the defender a chance to fight or fight back;
-Dwarf- Get Shieldbearer 1 melee attack. Those huge shields are very powerfull, so hitting someone with them would deal some damage. (this was made in other version of tharferr).
Elf- The Caragous should be a defensive unit, and so grant them real defensive numbers, maybe around 8 defence points. The attack you chose something you like.
Gnome- Reduce the cost of plank and nails, and reduce the cost of Catapults and Balista. (this was made before);
Human - Dont see much need of change;
Orc- Release the Troll. Change the Axe Thrower unit, and change for a Axe Troll. This huge creature comes from the deeps of the realm. They are strong creatures who star in the back of the batle and throw their axes from far away, giving them some 3 of range. Althoug they are strong, they are not very efective in close fight, so they take 4 melee attack. But they are big and powerfull, they can take real damage, and stand firm, so around 8 to 10 in defence and 1 enforced leather armor or 2.
Undead- Someone said "its a race for the experienced". No experience can help you if your units are bad. Forget the Abomination caragous, and behold the Abomination Troll. This unit is made of the corpses of dead orchich trolls. The come with some costs, but like the orc ones they can take real damage, and can stand some 8 to 10 damage. Using the mounts they can deal real damage, somewhere around 4 to 6.
Also undead. If the units dont eat food, why does everthing else eat? Makes no real sence to me. The shadow legion takes 2 people to deal 1 of damage and 1 defence. Either use only 1 people, or increase the defence to 2.
This are my ideas. Many of you may not agree, and say, thats not thardferr, thardferr is about weakness and strong of the races. Ok, that was old thardferr, this has already taken many changes, so some different and maybe good ideas could bring new people back, either you want it or not, its us the "old ones" who are playing now.