I've noticed a somewhat similar trend with Kuzco. He's still the shiest and most independent snake here, but I've been seeing more of him ever since I offered him perches and artificial plants. It'll be interesting to see how Pandora's behavior changes when she moves into her new digs. No branch-style perching in the design as of yet -- though I've designed things in a way I can add it in the future -- but there's plenty of other climbing opportunities for her.
On a side note: I was able to make my way out to an expo recently, I really liked some of the coastal tigers I saw at a certain breeder's table.If it wasn't for the fact that I started my remaining caging upgrades and properly internalized the costs, the process of carpet #2 might have started up. Might have to feel things out again after the snakes are screened and caging upgrades are done. An Aussie carpet would round out the group quite nicely.