Can´t really share any workflow yet, because I´m still into figuring it out for myself. However, some conclusions…

Regarding PickUp tracks: no, unfortunately you aren´t able to add trigs to your PickUp track. Depending on what you want to achieve though, there perhaps are some possible workarounds. May depend on external gear too, though…

Regarding Neighbour track, I guess that would be the easiest way adding sequenced effects to your PickUp track. But then they ARE truly independent of each other when it comes to the sequencer controlling the effects. But if you´re out of tracks, it might be possible to use an LFO with custom waveform (= LFO designer) assigned to the effect parameters you want to control? I haven´t tried this myself, so it might be something that I´ve missed. However, I guess that all this depends on what you´re trying to achieve sequence-wise with your effects.

Regarding PickUp Sync: on page 56-57 in the manual you´re able to read about necessary button (combo) presses to achieve the same behaviour. However, the result are depending on if the sequencer is running or not.