One can surmise the decision was purely based on the financials, stock price & share holder pressure. Malibu does not appear to have the 3 event champion keeping that segment in play. The new ski boat market happens to compute to .00000001% of the US population, in other words hardly a vibrant market. Malibu's market share for the watersports boat market holds steady at 50% (bolstered by all the wake boats) and they keep expanding the wake segment portfolio. A quick perusal of the Malibu Crew site highlights an overwhelming focus on wake / surf boats and a negligible ski boat / slalom / 3 event topic volume. My conclusion, a no brainer they are suspending production. With that in mind, it does not seem likely Malibu will restart production of the TXI if the cyclical market theory reverses itself, it seems the market is simply too small.
So, 2 down 2 left in the last few years in our coveted niche. The US market for all things seems to head down the bigger is better path, no matter what the product (houses, cars, trucks, SUV's, boats, food consumption, beverage sizes, drugs, implants ....).