But after that first third it seems the gameplay part just gets abandoned in favor of the VN stuff. And it seems the recent updates focus more on the no-gameplay mode and VN content. It's a great VN, I'm not here to complain about that, but the fact that it's not tagged VN here seems like it will draw people looking for gameplay and disappoint them, while also getting missed by some folks looking for a VN and not realizing this really is one.
That's not really true.
It's just the way things are with rotation of content.
Before the Wilfred's Contracts gameplay was introduced with v0.07, game always used to to release content in the following format:
Main story/Main Event → Girls lewd/Freeroam → Main story/Main Event ''
(sometimes thing may be mixed up where it's 1 main event + 1 girls lewd etc depending on circumstances, but regardless, it all goes around, content dependent on the rotation).
With Contracts coming into gameplay (and into rotation), it's obvious there will be times where it would be lacking in gameplay because the focus would be more on VN.
However, even with VN parts, the contracts gameplay mechanic had been interspersed;
Outside the D-contracts, Ombra mission had at least one gameplay part.
Not to mention Gracie's events in v0.08 which had at least 2 or 3 gameplay using the same mechanic.
Also, I think some people might be under the misconception that just because it has "sandbox" tag that it's a full blown sandbox game.
While for some that may be true, that's not always the case.
Sandbox tag gets applied whenever Sandbox gameplay elements are in the game.
Whether it's in 80% of the game, or 50% of the game or 20% of the game. Doesn't matter.
As long as it's there, it's treated as such (with DeLuca, I see it more as moderate-sandbox, with the Wilfred's contracts gameplay system).
In the end, it all is dependent on how much sandbox the dev wants to insert in (but the tag rules still applies the sandbox tag).