Ooops…
bluez_5.79 conflicts with librem5-base-defaults but it should be resolved by apt (I propose the version 66pureos1~byz3.1) . So, you could try to upgrade it first.
Touchscreen… it may be related to i2c bus recovery enabled in dts file (which also included in this kernel) by the patch. But I have no issue with my touchscreen… Everything works fine.