Let's first address the songlist, as that's what seems to be causing arguments already. Yes, there are Kyle Ward songs in the game. No, they are not the bulk of the songlist. Most of the songs are indeed songs from older Pump mixes, some of which apparently did not make it back for New Xenesis. Then you've got a good number of Kyle's songs from ITG1 and 2 (not all of them though), along with a handful of songs that were rumored to be in ITG3. Stop & Go, Esperanza, Ra, Hasen Mich... probably some others I'm forgetting. I believe there are some other new songs by artists who aren't Kyle too, but like I said, I honestly can't always tell which songs are new because I have no access to newer Pump mixes. Anyway, there's around 126 songs or so on this beta, and I don't know if more will be included later.
For what it's worth, the step patterns for the returning ITG songs are not identical to their 4-panel counterparts, i.e. there's nothing like the repeated Right arrow stomp on Utopia. Zodiac's chart looked a lot easier too. ITG1 songs like Utopia and Xuxa were edited down time-wise. Robotix has no 1337 bpm speedup, instead it's just one long pause in the middle, which is pretty lame. Xuxa has no BPM stops at all.