Is the Designer Still Designing?

I'm brand new here and have only had time for a quick look around, so please forgive me if this topic has been proposed before. It's something I've wanted to ask for quite some time now.
If an initial intelligent designer is posited as the reason for the biodiversity we see today, does that intelligent designer still exist? If not, what happened to it? If so, is it still designing? If the latter of these two possibilities is the case, then why do we not see radically new body plans appearing currently? Just taking animals as an example, we see a very limited number of basic body plans. If the designer still exists and is still designing, why don't we see much departure from these.As an example, all winged creatures have either six or two limbs in addition to their wings. There are no flying myriapods or quadrupeds. Why not? If one posits the existence of a designer, what constrains that designer from suddenly bringing such radically different forms into existence?