The earlier KA Kults were more like a wave sail with the draft further back and relying more on the mast stiffness to get shape in the sail. This made them more powerful in lighter winds but less top end stability. I have not used the new Kults but I was very impressed when I had a play with some on the beach this summer. There is much more built in seam shape and better battens with the draft definitely locked more forward like a slalom sail, more like the Koyote. For slalom/freeride blasting, the more draft forward style has more drive and stability in the top end. Sails built like that are also a bit less sensitive to different masts. It is really just a matter of what type of sail you prefer and you type of sailing. Many wave sailors really liked the Kults as their light wind wave sails and the sails were great for that use.
I am not familiar with the Sailworks Hucker so I don't know which type it falls under.
A '90's 3.2m is probably way superseded now by much better designs. They tended to be quite high aspect, short in the boom and rigged on long stiff masts. All things that are a sure recipe for 'twitchyness'.
Water starting cammed sails is a skill you learn and develop with experience.
First, you learn not to drop them in the water so much!
And when you do you try to avoid sinking them. There are many little tricks you can learn to keep them up and flying, or fly them quickly before they sink. Likewise, there are tricks to get them out of the water if the luff floods, like pulling the board tail under the boom. Also, going to the mast tip and swimming the sail luff first into the wind whilst sinking you body and extending your arms over your head. Always try to let the wind do the work for you. Wearing more buoyancy in the form of a full wetsuit and/or a buoyancy/impact vest helps as well.
The KA Koncept is narrower in the luff sleeve compared to the KA Race and most cammed race sails so even if it floods it is easier to empty and fly again.
Its is great if you can actually try some different sails and boards at you home spot but it is important that they are rigged and set up to suit your size and weight.
If you can try some different ones it helps you to make sense of what might suit you. I still think you would benefit from a quite small slalom board (around 70-80L) or larger speed board. Combined with a 4.6m or 5m Koncept on a light RDM mast you would be noticeably faster and more comfortable on the speed runs.
I have a few things you could try.