I take it he was more talking about new gameplay ideas. Those are always a good thing to have.
At this point, I doubt it. It is entirely possible to create and execute a good story with the toolset, ideas, and assets that came with Retail; retail itself did so. Yet the fandom is littered with the unmarked graves of projects and developers who rejected this idea and consequently never got anywhere, and the monuments of projects that have all kinds of content locked up and going nowhere for the very same reason.
Even extending only to the least-opaque improvements the SCP has made to the FREDding tools and off-the-shelf models, tables, and effects, and what the collective brainpower of the community has already proposed and is possible without serious scripting, we have more freedom than just about any other modding community. Yes, there are things that we don't have that I particularly would like, but they're hardly critical to any campaign I would build. At this point I don't think I or anyone else has room to complain their options are limited and they absolutely must have new features or new models or new effects or do something really new and different. It might make their lives easier, but they don't actually
need it. They could write around it, or write another, equally good, story with the tools at hand. They just don't want to.