Look like opinions are divided on this one...
Here's the argument in a bit more detail:
(1) It adds unnecessary complexity to the game. Fantasy TBS's get along fine without it. (Play any one of MoM/AoW/HoMM/Dominions/Battle for Wesnoth, if you don't believe me.)
(2) It creates a non-magical alternative, cheapening the value of that magic.
End of zigzag's quote
So your argument is,if its something used just by few games or unused so far,its not good ?
You dont want any new idea to be implemented ?
You basicly want all games to be copies or mix of those games you named ?
Bad argument,imho.
it would just change your frustration from "need 1 or 2 spaces to reach the town" to "need 1 or 2 spaces to force march into the town"
End of landisaurus's quote
I will agree with this.But you always need few more swords to finish build those soldiers right now,you need few more magic games to be able to cast that spell and so on.
You can get swords and magic stones from trade,for example,why not add option to increase movement,with the cost,of course ?
It will be overused ? Sure, if its not balanced properly.
I like the idea of exhausted units need full day/turn rest to become normal again...
My original idea was that for 1/4 movement bonus units receive 25% stats reduction,but we can expand that idea.Lets say next day all those units will have 50% stats reduction(they are exhausted from forced march + battle) and can move only 50% of its original movement,if they rest(no moving,no fighting) they will have 25% penalties next day,but if they move just half of their movement they will be on normal next day,if they use all movement,they keep penalties...so you have 25% first day you used force march,next day your units have 50% stats reduction and next day 25% again if they dont move or fight,so you need like two days rest to recover full stranght back,and your army is very vulnerable next day after using forced march.
Linking forced march to moral also sound great,for example,only units with high moral can be allowed to use this option,if you try to force low moral units to do it,they will refuse or even rebel.Also lowering of the moral for exhausted troops make sense.