Tell ya' a story about our first long-term signage....
We removed the panels from a lighted sign and had to duplicate what was already there. It had only been up for 3 years. Having been in vinyl a whooping 3 weeks, we were, for sure, pretty clueless. I looked over the provided art and replicated it exactly. The big thing was he wanted it to show at night... of course I didn't even know transluscent vinyl existed at that point. So I replicated the artwork exactly (only better lines and better cutout) increasing what I was sure was the intentional gap between the green and purple (see picture 1) since that was how I thought you made it show at night!
As we all know now... it was shrinkage...
Here is the art we did using Oracal 651 (picture 2), but the motto of the story is - like OP said - no one product is good for everything! After a year it is looking okay, but only because we convinced the owner (and believed it ourselves) that the gaps were intentional to let the light through!!