Maybe they are not bad and can be usefull on frontline but most of the time u drop them near your base and only on sector because u want be safe when u pick mortar and at but as people said this ability is usless at cp4 in my opinion this should be only mortar at cp1. And why cp1 not cp2 because this commander need some boost or no one will use it as it is now.
What u guys think about that if hq was available cp2 but offmaps in that bulding cp10 something like wc51 offmap.
If the ability is going to at cp 1-2 and only a single mortar then it simply be a call-in unit...