This is a conservative approach from Intel which isn't new. The cancelled Cannonlake-U was a 2C version, Broadwell was 2C. All the last CPUs on a new Intel process were conservative. This low core count (even if there is a 6+8 version) is also a strong hint it's mobile only. They obviously won't/can't go down from 8+8/8+16 in the desktop.
They (theoretically) could use the older Intel 7 for the iGPU, maybe this is an option for the 96EU version, this is a cheap alternative why not. As for the 192 EU version I don't think so, to fully make use of 192 EUs they also need efficiency improvements on the process side, be it Intel 4 or TSMC 3nm/5nm. It's a bit of a waste if they don't have efficiency gains over Intel 7. I would guess they have another 2x performance improvement target over TGL-U or even ADL-P 96 EUs just like ICL-U over CML-U and TGL-U over ICL-U.