One thing to remember is that pastels, regardless of the brand, are either slightly goopy or REALLY thin. The streakiness comes from the pigment not being as strong.
I use a base coast with a slight milkiness to it like essie ridge filling or grow faster. Pastel cremes are pretty much NEVER one coaters, so make your first coat kind of thin. Yes, it's going to be streaky. Let that dry pretty well and then do your second coat a little thicker than the first. As long as you didn't leave any bald spots on the first coat, it should even out fairly well. If you feel like you need a 3rd coat, make it really thin or your nails are never going to fully cure. Once you apply your top coat, it should level everything out.
I hope this helps! Also, I used jeanne last night in a quick and dirty mani:
Julep Jeanne.JPG
I used the essie grow faster base coat, two coats of jeanne and actually got too tired to deal with a top coat after i did the striping tape disaster with iona on my index finger.