OP the graftobian is pretty good, if you like cream foundations. I prefer to use cream foundations with a damp sponge to get the like Charbal said "airbrushed" look, as I have dry skin and cream+brushes leave my face a flaky mess. So keep that in mind if you aren't happy with a finish just try different applying techniques.
Have you decided on a new foundation yet?
Yes, Mehron/Graftobian need to be used with a moisturizing primer, not a mattifying one. I use Jack Black Moisturizer w/SPF 20 under the Mehron and it always looks great! I have dry skin too, so I always slather it with Cetafil at night so it doesn't dry out. But you're right, you really can't use it if you have dry patches