Grammar evolving

We see comparatives being made with “more” – more strong (as well as rendered as stronger). Is that OK?
B. Can we innovate by saying, after making a serious statement, “At a seriouser level…”
C. Can we say, “After the holy month I was slimmer but none the piouser.” (As in none the wiser.) Otherwise you can never express this thought – “none the more pious”?