It is interesting whether the patient had a bout of vomitting just prior to the acute event.
If he did, then I suspect this is a deeper than usual Mallory-Weiss tear.
When these retching associated tears occur in the stomach side of the cardia, they don't normally tear the wall, and cause bleeding. On the esophageal side, they perforate (Boerhaave syndrome). I always thought the difference was due to the lack of serosal covering in the esophagus. Very interesting case.
I suspect that you were afraid to narrow the cardia by simple suturing. and I agree that total gastrectomy is a better option than proximal gastrectomy, in terms of late morbidity and quality of life. However, there is a better solution than either, and that is a Thal patch. The Thal patch is good because it will allow you to close the defect without narrowing the cardia, and at the same time act as an anti reflux procedure.