I'd love to see Guille with a stable coaching relationship, and we will see what happens here. I don't think Guille has suffered a great deal from changing coaches. His problems seem to have more to do with his body breaking down and his mental state. He seems to want to work with Gil Reyes very badly and Reyes shows some willingness to work with him also.
The Argentine tennis scene seems to be a huge soap opera with a lot of back biting, rivalries, gossip, and general bitichiness. Maybe it's better for Coria to have a foreign coach and step away from that overheated enviornment. Whatever works for Coria, I support.