just a suggestion - seeing as you are obviously progressing in leaps and bounds with this kilt building - in the side view the kilt seems a tad tilted - that is down at the front and up at the back.

I'm afraid you really need to give yourself a bit more space in the rear - the kilt is seeking greater width and is following the line of least resistance by sliding upwards.

With a bit more space in the back the aprons will then swing forwards and make a smoother vertical line, and probably also give a better swing.

Are you tapering the apron/pleats edges? I make a taper which is 2 inches deep at the waist going to nothing at the hem, like a vertical dart though I dont always sew them down, just press them in. That tends to bring the centre front up for some reason - though you have to let the top edge of the fold for the taper drop down so it does not pull the edge of the fabric into a pleat.

The 2 inches seems to be just enough for me so the back and front of the kilt look level in wear.

I think the trick when fitting a kilt is to make it just small enough to sit right, rather than letting it out until you can just squeeze into it.