Thanks for getting the scoreboards going again over the weekend. Even veteran folders can be fooled when they stop updating.
As far as what can be improved, there's been some talk lately (mainly in the #veteran chat channel) about making a good first impression. There are a few relatively easy steps in that area.
Before she left, inkycatz published a new post Get Started Playing Foldit in the forum. The "Are you new to Foldit" link on the main page could be updated to point to that post. Also, the beginner puzzles contain a link to the same post, and this could be updated as they expire. (There are six beginner puzzles, one expires each week and is immediately reissued.)
Also in the forum, there's a sticky "Update News" thread which hasn't been updated since 2014. It seems like release notes like these are a thing of the past, so it's probably time to un-sticky it.
(There's also a "Do you believe in the past life?" post in the forum that should be deleted.)
Just in general, keeping a eye on the forum and the #veteran channel is a good thing. Opening a puzzle from time to time and making sure that the scoreboards are working would also be helpful.
The technical issues are the harder part. The switch to Amazon Web Services last year seems to have eliminated a lot of network-related problems, and there have been some recent fixes, such as a new installer for Mac, which have helped make the Foldit client more reliable. In my experience, client crashes are much rarer now than previously, but they still happen from time to time.
Some bugs are in the client itself, but others are in the puzzles. The recent drug design puzzle in the "devprev" update group wouldn't open. Puzzle 1378 was clearly wrong from the start; it would have been impossible to get a positive score. It was reissued as puzzle 1378b, but even then, the rebuild and remix tools weren't working. Issues like these tend to be a little discouraging for old and new players alike. Often just a quick check like opening a puzzle would reveal fatal flaws. There have been a lot of "b" puzzles that could have been avoided this way.
The feedback area is used for problems and suggestions. The problem there is that we don't get much feedback to our feedback. It's now rare for the Foldit team to comment on a feedback. It would be helpful to get an update when a problem is believed to be fixed. It would also be nice to have some sort of issue triage and tracking. It might be a simple as a top 10 list of what development is working on at the moment.
While response to feedback has lagged, there have been some more recent positive developments on the communications side. The Foldit team now seems to be a lot better on issuing news items to report things like a new release or a system or puzzle problem. The news items appear both on the Foldit front page and when a Foldit client starts. Once in a while, jflat06 joins #veteran and lets us know what's going on. The recent blog posts about design puzzle results seem to have supplied some added motivation on that front.
(There was also a missed opportunity last week, when the Foldit entry in the NSF's STEM 2017 video competition didn't get mentioned until Susume posted it in #veteran.)
I've been folding for a over four years now, and at times, the future of Foldit has seemed a little doubtful. There do seem to be some flickers of life from time to time, so I'm remaining guardedly optimistic.