With patterns there is no problem - they are shared between arranger and scratch pad. Arranger section also can be shared copy (even with parts that are shared! but it takes all tracks and modifies all of them in one time).
But eventually there should be option for sharing or not them between those two views (like cmd+drag to shared copy, or only drag to separate copy in one view).
I'm using scratch pad as "parts/clip bank" to compose track - many repetitions with the same part/clip and eventually change them with one edit operation and not replace all occurences in track after signle change in one of them. Something like "parts bank" (shared in bank and arrangement) it would be a killer feature for me.
