Hm, I don´t really get why "Fallen Enchantress" should be a bad title?
I mean, honestly, how silly is it to assume, people would associate a person who has fallen to the ground?
Wouldn´t that rather be a "Clumsy Enchantress"?
Yeah, being critical is a good thing but there also is a being ubercritical.
If we assume that the targeted customerbase doesn´t get what "fallen" and what "enchantress" mean, we can assume that almost NO title would be "save" and unmisunderstandable.
Even more, the targeted customerbase seems to be a small fraction (EWOM-users and -interested) of a fraction (fantasy strategy/4X gamers) of a fraction (fantasy fans or computer gamers) of a fraction (computer owners) of the people who could possibily misunderstand the title; I honestly assume that an overwhelming majority of these customerbase will instantly get what "Fallen Enchantress" will mean.
Apart from that, from the point of "Does it catch my interest?", I can´t find anything wrong with the title either.
As was already said - it is short, it contains "fallen" as in "fallen angel" as in "battle between light versus darkness", as well as "Enchantress" as in "Magic is an element of the game."; plus, as a bonus, the association with seduction, e.g. sex.
All in all, primitive as one may find it, a pretty catchy title, if you asked me.
PS: There is no such thing as perfection when it comes to naming.
So many associations mingle here, that there will always be people who don´t like a name, title, designation.
I still remember the discussion that arose when DnD 3e was to be translated into other languages; especially the terms "sorcerer" and "wizard" were highly debated because there were no exact synonyms for these.
In the end one has to make a decision though. That doesn´t free you from the responsibility to look for the maximum in accordance, but it means that you´ll HAVE to stop looking for it at some point.