I'm not sure if there's an easy way to do a wholescale change
yes there is... you can set "layer".
I mean "replace all the 0805RND packages from their RCL library with "My favorite 0805" package from my "myrcl" library, or the equivalent.
the 072 (which is my favourite "crystal-less" MCU) is like... $1
I suppose. But you also eliminate a crystal and a bunch of other components associated with the auto-reset function - those are probably worth another $0.20 or so?
add Layer 49 to the silkscreen
Yeah, I usually finish things off by running "silk-new.ulp", which copies all the relevant objects to a new layer, where they can be shifted around/deleted/added/duplicated at will. But in this case, I'm objecting that the RCL packages don't have any outlines or symbols on them to copy...
If you want some help doing a "final" layout cleanup, let me know. I seem to enjoy that sort of thing 