If you're moving in the next month or so, probably not worth the risk and hassle.
However, playing Devil's Advocate role, I just re-aquascaped my main display (165g) from its old 1 big, 1 smaller rock structures to just having a redone large structure and a large open sand bed. It's sorta like having a new tank to look at. Deals with my "ok, time to change things up and upgrade" syndrome for the time being.
For instance, my old tank looked like this:
To this:
The flow patterns completely changed even though I didn't really move the WP-60 in the back and though I'm still getting used to the new look, it's something different for me to look at and gives the fish more space to swim around in.
So, I guess what I'm trying to say is, do whatever floats your boat cause it's your tank & you're the one who has to look at it all the time. If you change things, be forewarned that it will take several hours for a large tank with lots of corals to dismantle and reaquascape. I redid my main display and the sump overnight (literally from 11:30pm till 7:30am and then stayed up till 10am to make sure nothing was wrong. The reaquascaping part though only took about an hour, but for your situation probably a lot longer.
Good luck with whatever you decide.
Anthony