How to restore a pg_dumpall dump without CREATE INDEX?
I can see one workaround for this, by using pg_dumpall in two steps: 

pg_dumpall --schema-only ....


Then edit the file and extract the index definitions into a second file. You also need to extract the foreign keys, because you have to run them manually after the import (probably together with the index creation script)

Then run that script (without the indexes) to create the (empty) tables. You 

pg_dumpall --data-only ....


Then run that script to import the data into the new database. After that run the FK and index creation scripts.