If choosing certain options makes the game too easy for you, and you don't like that, don't choose those options.
I mean seriously, how in the world does something like this escalate in importance in your POV that you consider it game breaking and regretting the purchase? That's like complaining that the developers added an "easy" difficulty level and it makes the game too easy because you can't stop yourself from choosing it.
Certainly balancing is important, and it wouldn't surprise me if they made some tweaks like making Zombie and Leech incompatible (or whatever), but it's not like they don't have more important thing to be fixing at the moment. Until then, perhaps you should try exercising some self control...
