Hello Sandie
Don’t worry: books written in the first person, present tense are not a turn off for agents. It’s just me who – at the moment – is a little weary of them, as it seems as though everything I am sent these days is written in that voice.  That said, I have recently signed a new client writing in the first person, present tense because their manuscript is just so good.
For what it’s worth, if I were a writer, I would never re-write my novel from a different point of view just because an agent has suggested it, unless I believed, deep down, that that was how the book should be written.  An agent’s response to a novel is subjective: what one agent loves, another may dislike.  You should write the book that is calling to you.  That will make it the best book.

Where I would consider re-working a novel’s POV, were I an author, is if a number of agents have made the same comment.  If a lot of industry experts react in a similar way to your manuscript, it’s probably worth giving serious consideration to what they are saying.
I hope that helps? Good luck with your manuscript.
Polly