i agree that wrobot could be better but your experience with wrobot is a user issue not a programm issue. did you ever check the "advanced settings" ?
if your bot starts fighting with 50% you can change it to whatever % you like to. if your paladin doesnt work properly spellwise your fightclass is the problem. if you have the feeling that the bot looks to much like a bot you should get some plugins like smoothmove, humanmasterplugin and such. and maybe you should not bot with warriors or paladins because they need a lot of gear and they are weak on low lvls. best botting classes are hunters, warlocks and druids.
you should also make sure to run wow 32 bit and use the english client for proper working.