Vogue 8900 bias binding finishes progress or digress?

I am not sure what criteria Vogue have used to describe this dress as easy but the cut outs and binding finishes don't really come to mind as an easy project for a beginner. Too many pitfalls waiting to catch me out . But I'm trying my hardest here

The pattern instructions for finishing the armholes , neck and side opening suggest cutting your own tape in lining folding, basting the strips and sewing to edge as mini facings.
There is no added interfacing.

I've been starring at the Carven toile versions for days now and for the fabric not to flop and keep the neat line around the edge I figured you would need more than just soft binding made of lining fabric.

I also read Erica B's blog report on her finished dress and she makes it clear stabilizing the edges is the key to success (thank you Erica).

So I bought a stiff cotton organdie partly folded bias ribbon.
This is very odd when you first handle it as it's very stiff indeed with a texture like paper. But, when you steam iron it into place it becomes soft and manageable so perfect for bending around the curves of the dress edges.

Let me just say I did an awful lot of hand basting, steaming , more basting and more hot steaming and I'm still not 100% convinced of the results :

beginning of Binding experiment

During, in between and after

And from the outside. I'm happy the dress has got body but I'm hoping the wavy effect is due to the dummy not being the right size AND NEED OF MORE IRONING.

I tried on the dress at basting stage and bf said fit is okay but I need him to take pictures of me in nearly finished dress to see it it's got a smoother fit.

Ah well it's not finished yet so we shall see in the next couple of days if it turns out okay.