If it is, they really, really really
are improving. I think it's rather lovely... for a pwt.
(but that's me not being a pwt afficionado)
But as to what is is called, I'm clueless. "Surface decorated", which applies to uncased vases etc. doen't quite seem right.
Murrine? (Mhurrine?) - There's a name for the Venetian vases made entirely from a jigsaw of canes in the surface...