I do agree that the cryptic tweets could quickly become agonising (and boring), especially if nothing substantial is being said. Hivory Towers is just confirming they are rich and ruthless. Quack Corp is giving more away, but it's so cryptic that it could almost mean anything...
I would rather see something like the original jungle screenshot with Yooka and Laylee hiding in the bushes. Finding something hidden in pictures is awesome. Or even something like the mysterious face on the mountainside. I always look closely at all pictures Playtonic release, hoping to find something hidden in the background like a new character design on the desk, but there is never really anything there (yet).
With that said though, I don't want a massive reveal (even though I do). The final game should not be ruined. A few more screenshots, small segments of worlds, will be more than enough and will generate a good buzz -- Hivory Towers reference not intended.
P.S. Just read Grant's tweet. Seems really promising that something good is coming!
P.P.S. People keep adding new things every time I try to submit this post. If the update is just information (with no images) about Hivory Towers and Quack Corp, I am going to be so disappointed. Doubt it will be though -- that's not rambunctious enough.