most body shops like to paint to an edge as its easier than blending 2 paints together and feathering in the colour. you might be alright and the bodyshop says they'll blend it in. rear hatch isn't too bad, as there isnt alot of metal to paint, its mostly glass.
as for the front, if your respraying the front anyway then it shouldnt be too much to fill the badge recess.
only guidance would be that they should fill it with GRP first then finish off with a filler. most good bodyshops should do this anyway. but cheap places might just try a filler job, looks fine for a few months, then you get some plastic retraction through a heat cycle or a knock and the filler will crack out. if its had a glass fibre fill then finished off with filler it should last mucho long time.