I assume Falcom is making the Switch and PlayStation versions (given they've done the Switch and PlayStation versions in-house for Daybreak/Kai and Ys X on the same engine), and either them or GungHo are doing the PC port. At the very least Durante confirmed on Reddit that neither he nor PH3 are involved in the announced PC port (yet?): https://old.reddit.com/r/Falcom/comments/1hhlayv/the_legend_of_heroes_trails_in_the_sky_the_1st/m2st366/

Plasma has generally respected custom icon themes. I imagine that if this change does indeed land within the default Breeze icon set, that it would be possible to run either an older Breeze icon set, or a completely custom icon theme to restore colored icons.

I'm cautiously optimistic about this, because Qualcomm has been actually putting in some work to get the mainline Linux kernel more supported on their Snapdragon X Elite laptop CPU: https://www.tomshardware.com/software/linux/qualcomm-goes-where-apple-wont-readies-official-linux-support-for-snapdragon-x-elite. This doesn't necessarily mean the same benefits will come to their mobile chipsets, but I'm hopeful that there is some runoff benefit from their new laptop efforts here.

While I do not expect to see Android devices with future Snapdragon 8 Gen 4 chipsets immediately booting mainline kernels on release, this might be a step towards achieving something closer to that. Those efforts will certainly make it easier for phone manufacturers to release updated kernels, and therefore Android releases, for their devices, or at least stop using Qualcomm as the excuse for not doing so (see e.g. Fairphone 4's software support roadmap: https://support.fairphone.com/hc/en-us/articles/9979180437393-Fairphone-OS).