I'll preface this by saying that I've never eaten there, and based off the podcast's review of the restaurant, I've been scared to even speak of it LOL

. I'm exaggerating, but you catch my drift. Basically, that review they did sounded like H&V was one big waste of time, so I've steered clear.
But I will say that if you already have a character experience planned, why do another with the same characters? Maybe I'm mistaken, someone correct me if I'm wrong, but isn't H&V the same characters as Chef Mickeys, just different outfits? If you want to do character dining with the same characters, I'd say either go to be a better restaurant with better food (Tusker House), or go to a different restaurant with different characters AND good food, then it's not a disappointment.
I have been to Mama Melrose multiple times, and it's great, in my opinion. I really enjoy their pasta selections, their sauces are yummy. I will say that pasta can sit pretty heavy in your stomach, so maybe pace yourself or skip a heavy dish if you anticipate still riding rides after your meal.