The big question is...will it make it better?
I've been thinking about tearing mine up and redoing it to replace the four 054 switches and all the 054 curves on the inside industrial siding track with 072 switches and curves. The only thing that would really give me is the ability to run my passenger cars and E7s onto the siding track without derailments.
The other thing is I don't like my attempt at ballasting and scenery and would like to remove it all and start over.
Thing is, I have no reason to really run my passenger cars on the industrial siding track, my freight engines run on it fine. As far as the ballast and scenery goes, I'd just as soon leave the ballast off (wish there was a laser tool so I could cut into my rubber roadbed so the track would sit down in it). The scenery can be done simply with paint and a shaker full of Woodland Scenics grass and earth.
I use Gargraves flex track and Ross curves and switches, the Atlas track does look better IMO but those looks come at a price.
I've decided to "Let her ride" for now. I'll work on some scenery as I add more detail to a given industry and if I decide to replace the 054 with 072 it'll be a section at a time.
I really don't feel like spending upwards of $2000 to replace it all when what I have seems to be working, especially when I'm unsure of the outcome (due to my lack of artistic ability).