Some tweaks can be done to improve its usage :
Add internal EU storage, which is instantly used to mass fabricate whatever thing is required. [Internal storage is equivalent to a mfsu]
Add upgrades, so it can receive more EU per tick, be overclocked (consume UUM faster, at the price of using more EU) and eject mass fabricated stuff to chests adjacent.
What about overried only replicated stuff and make and upgrade like that which already is. Mean now is "Ejector Upgrade" & "Liquid Ejector Upgrade". So, what about "Automatic Ejector Upgrade" etc.
and not only for this one, but for all.
Or make it both. Ejector for tell machine "Eject resource UP" and automatic "ejected it up" because it'll cooperate. 
But, I would like to see something like that too 
Maybe some co-op with RS signal
replicator is bad in current implementation.
best solution is:
work as teleporter - drain power from ajucent energy storage without direct connection (9 below 8 nearby).
same with UUM, just enum nearby blocks and drain from them without actual connection.
scanning or patern storing not required, accept any item that have cost info and copy it as fast as it can using energy and uum from nearby storage.
