Yup, as mentioned above, lot of changes and new features are still coming. I was off for a good few months recently and have been back for a few weeks now, lot of changes and new ideas surfaced during the off time and they are now all being implemented starting from L4D1 where pretty much the whole cheat related "codebase" was overhauled. I personally have thought of directing my "workflow" from the lesser popular products (older games) to the more popular games (newer, more popular games), this should ensure even the least popular products get attention and have their features and code up to newest standard since there's not really any reason to work on them otherwise.
EDIT:
There's likely also gonna be some sort of "anniversary edition" of L4D2 coming sooner or later, I'm not sure if this is just L4D2 or will L4D1 also be affected. Either way, once that drops I will likely also stop everything else and focus on the "anniversary edition" instead (since there's apparently going to be some noticeably large engine changes, infrastructure changes etc.), so the new version of the game can get a full support as fast as possible, with minor downtime of RH itself.