Hi, support Shaco main here.
Personally, I think having the permanency of the Vision Ward (i.e. its infinite duration) is awesome. Coupled with True Sight, the Vision Ward feels unique and special.
I wish Riot would apply this kind of design to wards to give us a larger variety of wards, thus making the vision game even more dynamic.
For example, I'd like to see what I call the Sentry Ward. It costs 75g like the Pink, but it grants True Sight in a cone around it, with the cone rotating. It would be visible to enemies, but is indestructible for it's duration. The idea is that it counters / deters stealthed champs and gankers in general, but has built in counterplay - you don't need a special item to interact with it. You can skirt it's vision range, run by it if you're quick enough, opt for a different gank route, or outright disable it for a few seconds.
Here's a nice mockup of it and some other ward ideas I had, including a slightly altered Vision Ward that I call the Beholder (points if you get the reference!)
What's your idea?