A couple weeks ago, I received a revise and resubmit from an agent. She loved my world and my premise, but she didn't love the main character and her interactions with one of her fellow Vamyraset Agents. That same week, I found a beta partner on the Absolute Write Water Cooler Forum (BTW, if you're a writer and haven't checked out the AW forum, it would probably be in your best interest to do so. It is a great forum with a lot of knowledgeable and helpful members including quite a few published authors and other industry professionals,)
Both the agent and the beta partner have brought up similar concerns, so I'm knee deep in revisions. My beta partner has also pointed out flaws the agent never even mentioned, which I'm grateful for and also annoyed with. Not at the beta, god no! She's been fabulous. I'm more annoyed that these flaws have lasted through countless rewrites and nobody else caught them. And I'm including myself in there. Thankfully, I don't have to do a complete rewrite. The changes are minor enough for just a few tweaks here and there.
This is an aspect of publishing I was not looking forward to. But I'm gonna put on my big girl panties and slog through it because I WILL be published one day and if this is what I have to do to get there, then so be it.