There are an infinite number of techniques already in Aikido. Takemusu Aiki springs forth each time you do a technique on a different person. That is the flexibility of Aikido. It's not how you finish the technique (their all pretty standard--for the most part i.e. ikkyo, nikyo, sankyo, kotegaeshi, etc.) it's how you get to the special place that allows you perform these that can differ greatly based on mindset, attitude, training, Sensei, Sensei's sensei, etc.
I think it is good to delve into non-traditional attacks so you can blend, flow and move to a safe place where you can apply an "Aikido Finish".