Your 7/8 never sounded me as odd. I really like the arpeggio you put in from the start in 4+3. It's a very well-balanced piece of ambient music in terms of rhythms, progressions and variations in arrangement.
As it's a challenge on signatures, I would have liked more rhythmic risks. Many of your patterns play on eighth notes, or are held notes.
But at the same time, given the color of your music, I think it was difficult to do otherwise without distorting the contemplative aspect.
Anyway, I liked it (I even listened to it twice).