I think it should be great to have a (Income/Second) or (Income/Minute) right beside your total money. It would become an easier task to track how much you earn and make your life easier choosing jobs to farm.
Never played the series before, but well...
Pros:
-I really liked the smart cast for the skills.
-Fun to be playing while doing nothing at work (like myself)
-I liked the monster power bar, a nice way to farm/level up
Cons:
-Short game
-The objectives are repetitive and somewhat easy to beat if you farm and level up properly, playing 2 or 3 times the previous levels.
-Premium content which isn't premium at all
I could go over and over but well...
Its a fun game, you can kill some time in it, but don't expect to play it throughout the week, or the weekend! It's a one time thing, you won't call it back by the morning. You won't even kiss it goodbye actually. 2/5
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 "Sentry Knight 2"){kind=icon}
 "Knightmare Tower"){kind=icon}