Potent and relevant question that points out how difficult being a convert can be, even long after the conversion process.
Since your question was "What are your thoughts?", I'll point out that a technicality of accepting a conversion is that the converting person must accept the mitzvos according to the understanding of the Beis Din. This is so that there is a record that they have accepted the mitzvos according to the interpretations that religious Jews use. In order to establish this record, we need a Beis Din of people who both know those Mitzvos and interpret them according to accepted modes of interpretation.
Since intermarriage is forbidden by Torah law, and officiating an intermarriage is encouraging/enabling a Jew to transgress a Torah law according to all accepted interpretations, the statement "I'll think about it", suggests that he might be considering alternative interpretations to Jewish law than the accepted ones. That would throw suspicion on whether or not there was a kosher Beis Din to administer the intent of the acceptance of the Mitzvos when the conversion was performed.
(Again, since you asked for our thoughts I'll note that officiating an intermarriage is not a neutral stance at all. It's an extremely clear divide which requires a change in core, fundamental beliefs to be able to cross. Likewise, thousands of older folks who have given up virtually all religious practice hang on to that one precept, imploring their children and grandchildren to marry Jewish. Those Jews, who may not be wildly knowledgeable or faithful, and who often have had to give up so much of their former practice because of war and pain, still recognize this as the one Jewish value they cannot compromise on. For a Rabbi who claims to be religious to even suggest crossing that line, requires a total dissimilarity of outlook.)
That kind of suspicion can be very damaging to a person, because the consequences of its potential confirmation can be quite far reaching, as I'm sure you know. As a result,
I can understand why it might be suggested for someone who converted in earnest and had something patently unfair like this happen to them, to perform a second conversion.
I'm no expert in conversion, just sharing some thoughts.