I have been a Receiver for MANY many years and a Reverse Logistics Processor back when it was still a specialist position. When both areas combined into one position it was a difficult transition and just as soon as I got my priorities in order they stripped me of my job title and added more poop to my job. However that is one thing you can be sure of is that some processes will change and then you're back to square one on how you can add this 'new' thing to your other duties. LOL It's like a whirlwind. Like a calm before the storm.
As for signing, I haven't had that position so I can't really say if it's harder or not. I know that when our poor signing ninja gets 4 pallets of signing, has to break it down and sort it all out I am amazed! When I go over to their area to drop off fixtures and look at all the stuff over there to me it's overwhelming. Our signing ninja keeps their area nice and clean, very organized and knows where everything is. They ask me to drop off stuff to them in a certain area so as not to mix things up and I can respect that.
Receiving is all about deadlines, priorities, vendor control and keeping things in good order. You are in charge of a small area of the store that is very high dollar coming in (DSD shipments, vendor product) and going out (CRC, MIR's, M&M return scans). You will nearly deal with every TL and ETL in the building and it is highly suggested that you keep very good communication with all of them especially your CTL, PA or whoever is running the market area.
Don't let people step on you like
@LogisticsFox said, "If I come in one morning and find a jug of milk on my desk, I go up to guest service and complain until it stops happening." because unfortunately some TM's like to push buttons like a child and see how far they can go. Also
@Backroom22 made a good point about vendors, 'be able to say "no"'. No is not a nice word sometimes BUT it will keep you from becoming a warehouse for soda and crackers!
I like my position, not every day is the same and some days are just more challenging than others.