I don't think any of the Welsh Internationals will leave the Principality. The WRFU is making huge efforts to keep them in their regional teams. We couldn't get Cuthburt and I don't think we will get Williams, though - needless to say - it would be nice to be proved wrong.
Cuthbert would have been the better signing, perhaps. He impresses me every time I see him play. Also, we need a bit of height and power among our backs.
*I could agree with you - but then we'd both be wrong...*