  We investigate connections between the sGG property of compact complex
manifolds, defined in earlier work by the second author and L. Ugarte by the
requirement that every Gauduchon metric be strongly Gauduchon, and a possible
degeneration of the Fr\"olicher spectral sequence. In the first approach that
we propose, we prove a partial degeneration at $E_2$ and we introduce a
positivity cone in the $E_2$-cohomology of bidegree $(n-2,\,n)$ of the manifold
that we then prove to behave lower semicontinuously under deformations of the
complex structure. In the second approach that we propose, we introduce an
analogue of the $\partial\bar\partial$-lemma property of compact complex
manifolds for any real non-zero constant $h$ using the partial twisting $d_h$,
introduced recently by the second author, of the standard Poincar\'e
differential $d$. We then show, among other things, that this
$h$-$\partial\bar\partial$-property is deformation open.
