There are actually some nice interface and content updates merged into what will be 0.4. Cooking all your meat at once will be less annoying, there’s some hinting in the item examination screen that will tell you what actions can be done (sorta), map tiles can store up to 64 items now, there’s power armor, new high-end vehicle parts, a new negative trait, beer kegs, steel jerrycans (I think they have a higher capacity), wound cauterization, and probably other things that I’ve forgotten to mention.
So, even though there was a lot of bugfixing and code restructuring this time around, we’ve not stopped working on making things better :).
I’m not sure when DarklingWolf plans to release the next version, but if he released it today, IMO there’d still be a nice set of additions and improvements.