Well, yes, as written it is a bit meh. Still, our group had quite a bit of fun playing it (although I did make quite a few changes). I think it has a really neat story.I thought that "the standing stone" was solidly "meh"... A ghost paladin that attacks the players for no real reason? I think this adventure had a number of problems.
Both adventures are a bit out there.I am probably in the minority but I didn't like either "Tide of Years" (the one with the lake and time motif) nor "Belly of the Beast" by Penumbra/Atlas.
I really wanted to like the former, but I found it wasn't really well executed. The idea it was based on was nice. What stopped me from running it were the consequences of solving the adventure...
The latter reads really cool if you can get behind the idea of entering the 'belly of a beast'. It requires a good DM with improvisational skills, though. Like the former it's not such a good fit for a 'standard' D&D game, though.