Like what? My fair is also that if i have a reasonable army, my vassals will backstab me when the army is not close enough to them (i've always red that armies have to be used or you're just wasting money)
Also i dont really want them to love me :p i just wanna take over there territories without losing honour. trying to convert the province and requesting allegiance usually takes to long, and leads to too big a garrison to request allagiance peacefully.
although i suppose i could use a sou to inspire a revolt, but yeah that also takes time and money