I think they are not important enough to create a new topic for each, so here we go:
-inserters cannot placed in a row anymore, because they cannot pick up the items from ground which the previous inserter placed there
- pollution-info is not shown in the steam-engine and boiler entity-info-window
- if a furnace's outputbuffer is full, it stops picking up coal and proccessing until the output is empty again (which IMO is good), but if it runs out of coal before the output is empty the no fuel icon is shown.
and btw I am loving the worms. They remind me a bit of Tremors, I just start watching the movies again while playing

EDIT: Oh just noticed that the steam engines do not produce pollution at all. Is it intended?