For me, it's a super exciting update like a lot of previous updates also.
I appreciate honesty and objective opinion but I prefer to be objective also by myself. Platform Builder gets a lot and quite frequent useful updates, a developer is reachable, any bug or suggestion reports won't be ignored but will be considered at least and now still a bit little-touched part of this application was touched a lot and got an update to fill hole which added more limits yet(in the worlds).
I must be honest... Platform Builder is a decent product for making decent games which were made possible by one person and even big companies often can't make something simple and still powerful like this.
Platform Builder is not very popular still yet but a lot of people are much more popular although having even no half such decent things made alone than this one. Platform Builder just needs to be opened and focused to see what it really can do...
If someone doesn't fan the look and design a lot then most of the things can be redrawn using free painting applications.