As it happens, I have a schiavona with a broad rapier blade and, although this hilt does have a thumb ring, it also feels quite comfortable wrapping a finger over the cross-guard. It would be more comfortable again if it was leather wrapped.
And even more again if it had a wasted ricasso.
Rain-guards are not uncommon though; quite right..
ps
That is the signature of the hilt smith: Grgr