I think there's a bit too much overthinking of perceived difficulty of managing a Peak4 with regard to landing and dealing with it in the water.
With regard to landing the kite, various correct methods have been described in this thread. However if you don't feel comfortable trying these methods at your usual spot because it's tight or challenging in some way, go somewhere where you have plenty of space, ie an open field or an open wide beach and practice until you are comfortable with your chosen technique.
Likewise with managing the kite in the water. Once again take the kite somewhere where you have an open expanse of shallow water and crash it. Then practice the various launch methods which have been described in this thread while you are able to stand in the shallow water and watch the effect your actions are having on the kite. This is way easier than practicing in deep water with your eyes just above the water level, your foilboard floating into your lines and the kite barely visible through the waves.
In the shallow water practicing you can see how pulling on the wrong lines too much will cause the kite to submerge whereas allowing the kite to gently drift on its back with minimal tension of the correct lines will allow the kite to get into launch position.
Being in shallow water you can tie the chicken loop to a stake and walk around to a disabled kite and put it into position rather than swimming.
You can also practice packing up the kite correctly on the water as you can see what's happening to the lines and kite as you do so.
If you practice the above it will start to naturally make sense of what you have to do. Sometimes too much written instruction can lead to confusion, you just have to get out there and understand it for yourself in an appropriate and safe place.
Once it clicks for you, the fear of the kite and handling it in certain situations will go and be replaced with the joy of a simple, inexpensive and easy to use kite that is fantastic for surf foiling and won't fall from the sky in light winds.
I've seen LEI kite people start using Peak4's, intimidated by the bridles, the perceived lack of water relaunch and a belief that how can a kite that costs half as much as a comparable LEI kite be any good, transform into raving adherents that use Peak4 kites nearly all of the time. They love the fact that they can unpack and be on the water in a few minutes and pack up in even less time. Some have yet to put a kite into the water! The Peak4's are also very durable and safe and I've yet to see/hear of one damaged in normal use, (including crashing).
Like any activity, practice is the mother of skill