Agreed.
I can understand not calling up LeBlanc to waste in a BP role since he "could" be our Rich Hill late blooming spot starter, given his K/9 and FIP, but there's no excuse to keep Danny Barnes in AA when he's more than proved that he deserves a look at least.
Well that earlier post explaining that Stroman himself wants to be a sinkerball pitcher despite being told to use it much less, so he may be too stubborn to convince without a demotion, and he's pitching good enough to stay, so that's unlikely.
He should be called right up, why not see what he has, he can't be much worse than what we've been getting from Floyd/Loup/etc lately and maybe he's actually a great addition.