In defense of arturia chaining is a complete 'freebie extra' not mentioned anywhere in original manual or marketing. They have to balance ease of use with functionality, and we're already seeing functions/button combos that you'll need to remember or write down because theyre beyond the original design spec.
if chains are savable, you're probably then going to want a way to manually change and edit patterns without erasing the whole chain, so you need a new way to erase chains, and also turn chaining on and off so you can loop one pattern to edit it without playing the entire song. Then there might be requests for a way to edit chains..
All these features are bound to end up on un-intuitive forgettable button combos and slowly erode the clean ease of use originally intended.