Thanks so much for your input, as a potter who has always inspired it is great to have your take on the subject... Sorry to hear you no longer have the time to make them as you once did.
My own path to clay started with a Cycad that needed something special, like you I could not find a pot suited to it amongst those commercially available and further could not find a potter to make it to my specs(some of that disconnect you speak of)... so the journey began, first with slabs (too much hassle) then handbuilding (soo much fun & soo many ways to do this) and finally stumbled upon carving (kurinuki) as the way for me. Deceptively simple...
With regards my comment on freeform pots, I should clarify... freeform slabs/trays are a great way to get the look of a stone slab without the extra weight given by the stone. However, the following is is a prime explanation of my coomment
I am off to play with some clay & oxide, I particularly love mixing different clays & oxides in a raw state then working into the form it dictates...I will be putting it into a freeform pot/ cresent shape and that should nicely hide the weak roots
Matt
Ps I am yet to make the Cycad pot but am nearly ready to start, enough practice now to do...