TX looks like it could be a new IP, but it can also be interpreted as the reinvention of predecessors. Beyond the original's remakes, Xanadu (the 1985 original, Revival in 1995, Next a decade ago) is the oldest series Falcom's supported in the Dragon Slayer umbrella. It seems to me they use the occasional Xanadu game to suggest paradigm shifts, assuming they are conscious of the following patterns.
Xanadu solidified the viability of Western-influenced domestic CRPGs; Revival gave way to remakes based on these classic IPs; Next concluded that period while justifying modern, action-based titles (Felghana came out a month after, with Origin and Zwei II in the wings) and emphasis on world-building/dialogue (largely new to a Xanadu game barring manual text). Excepting the original, Xanadu installments precedes additions and/or changes in platform: Revival leading into Falcom jumping from NEC to Windows, Next for Windows to consoles, and TX signaling a mobile debut as well as SoftBank pulling out direct PC distribution at retail (while XSEED now offers digital copies overseas).
Looking back at the period Dinosaur Resurrection came out in, Falcom had been developing remakes, but soon introduced Napishtim and Sora no Kiseki FC, which correlate to the period after 2005. Xanadu installments can be interpreted as projects meant to summarize ideas for stories and mechanics practiced in their other games, used to reaffirm both legacy and where they believe their pipeline is leading them. Even Publishing the original showed Masayuki Kato's confidence that Kiya had sound ideas for games Falcom could sell and expand upon not simply in their region. The only uncertainty for me is, did Falcom intend to show off their new/younger employees' abilities with Xanadu games aside from TX? Kiya made the original mostly by himself, at which point he was also a store employee needing to prove himself, but I'd love to know if Revival and Next were considered demonstrations.
tl;dr I'm considering a historiography of Falcom and Xanadu in order to explain how they can justify Tokyo Xanadu's changes, and why Xanadu installments are often used, perhaps motivated, as means to state new missions for the company and its position in the current industry.