Lisa had the potential to be an intriguing soap villain; and for a while it seemed like she may have had the potential to be a redeemable villain (see Miss Diagnosis). However her crazy behavior as well as the motivation behind this behavior is too much to grasp, particularly for someone who supposedly passed her psych evaluation at Shady Brook. Moreover it doesn't make sense that she could talk someone like Terrell into helping her destroy Robin just for the pleasure of her company. He doesn't seem like the type of guy who would be anyone's puppet. It's not like he is some inexperienced young kid with a crush. He seems too confident, too sure of himself to allow his life to revolve around Lisa and her quest to get Patrick. In fact he may be overly confident given that he is willing to help Lisa get Patrick while trying to make her forget him at the same time.
Absolutely nothing about this storyline makes any sense anymore. It's not interesting, it's just ridiculous. It was bad enough when Johnny and Ethan got involved in all of this but with Terrell involved too it is going to be a bigger mess than before. I hate to say this because Brianna Brown has done a remarkable job with the material she has been given but I really think Lisa has worn out her stay in Port Charles. If the most we can hope for is one scheme after another in order to steal Patrick from Robin then no actress anywhere is going to be able to continue to make that interesting.