The reason the non zombie guys should only grapple in certain circumstances is because the grapple is what make zombie mode so difficult and unpredictable. Adding it to normal arena without severe limitations would screw the entire difficulty curve and make everyones highest rounds obsolete and unrereachable, and no, resetting the highest rounds is not a preferable solution. Perhaps you should add the grapple to higher difficulties instead.
Dirted
And LEGOYasser is LEGOYasser, Saitar will probably stay Saitar and Dirted is still the same Dirted.
HERP!
They obviously have powers, look at the MAGs for example, they are super strong, even for their size.