Hi Yuri,
I have never been a great lover of soft kites for KAP, they have a habit of collapsing just
at the wrong moment, and a very fast decent of your gear. As you say, depending on design,
the angle of attack, and position in the sky can be very low.
A Rokkaku is much better kite for KAP, plenty of notice if the wind drops, and when setup
correctly will stay like a nail in the sky, if you get the correct one.
A nice version is this one by Premier kites, sparred in Skyshark wrapped carbon, very lightweight,
and a nice wind range. It is quite popular, but expensive in the UK, much cheaper in the US though.
Dave
http://www.midwestkites.com/single-line-kites/premier-rokkaku/rok-rainbow-focus-78-single-line-kite/