With there not being keywords or any penilty for being 'mounted' I have a few ideas to throw out here for discusion.
Add some keywords for when creating you characer like-
Armored (so that armorslayers and the like are usefull again)
Mounted (ditto on the weapons)
Flying*Peg. (")
Flying*Wyr. (")
others

Ok so you take the 'armored' keyword. you cough up 6 points to take it and you get +2 str, +3 str, -1 mov, and +2 con, also you are now weak to 'armor' weapons

if thats too limited, and you want more freedom. then you could have it like:

You take the 'armored' keyword. You lose 1 move and get +2 con, also you get +some def, but have a limit on the max growth percent in spd.

if thats still to limited my final idea for keywords is:

Blah blah blah 'armored' blah. You lose 1 move, but can put as many points in to defense as you want. no growth poor/ave/good to get in your way.
Ex. so i take armored, lose 1 move and then can put 8 points in to def even if i only have 40% growth.

you get the idea for what to do for 'mounted-horse','mounted-wyvern', and 'mounted-pegises', 'others'
A wyvern would boost move by 2 and maybe con, but limit Res.


My final idea if you dont want to do 'keyword's at all is to-
If the attacker is using a armorslayer and the defender has more Def then the attackers Str stat then the 'slayer is effective.

Sorry i didn't get to finish this post ... good thing it isn't locked.
Well, its sad that i ran out of time when i started it.
anyways', I will finish it now.
Stay toon'ed ;)
*this is sorta a bump*

Hm... maybe investing into a class can give more growths in certain areas?

Well, I think classes was an alright move, though I don't see the point of trading in stats for keywords, when all you'll get is +stats. I wouldn't mind bringing them back, but I don't really think it's necessary. The current system seems to be flowing pretty nicely.