It has already been modified with this update:
NUC11 models have been added to the officially supported list, some NUC12s are on the way and will be added when tested:
(Note: one model that is not on the list is not working according to a forum thread, so choose wisely)
If your NUC10 i7 does what you need, there is no reason to change. I have a NUC 10 i5 and with one audio zone and no DSP except volume leveling the signal path tells me that processing speed is x100 (a bit over x1 is necessary), so lots of headroom. And the remotes are fast as well. The idle power usage of the NUC10 is low, another advantage.
NUC11 and NUC12 will probably be faster than NUC10 and their power consumption will differ (most likely lower comparing like for like, but depending on specific models can be higher as well). The 11 has a better GPU, 2.5 GBit networking, and new M.2 interface compared to the 10, but you don’t need either, and obviously a new CPU architecture (faster, less power). There are lots of NUC and CPU comparison websites out there for details. However, if your NUC is far from being taxed, like mine, a faster one will not change much.
AFAIK the difference from NUC11 to NUC12 may be the bigger leap than 10 to 11:
- 12 has a new hybrid CPU architecture (Alder Lake) with some cores tuned for performance and some for efficiency. I have no idea if and how ROCK (or the Linux kernel) uses that.
- 12 with again better GPU, which you don’t need with ROCK (and which uses more power - don’t know about fanless options for that)
Same goes for tweaking yours. There are some options in the BIOS settings, but I don’t remember if they are at max by default and your only option is reducing them, or if you can increase them. If it’s fast enough, reducing options may make sense to save power. E.g., turning off additional cores that Roon is not using anyway.
IMHO, your 10i7 is a great platform. If you are not experiencing problems, forget about it and enjoy the music. (That’s probably why you have ROCK 
)