Trattoria is fine - it's not high end, but perfectly serviceable. Not a bad plan to save the money if you're doing V&A next anyway. I eat at Trattoria a couple times a year, often when staying at Boardwalk villas, just for convenience (I like their lasagna).
I do find the comment on chicken parm funny - only because I'm so incredibly picky about chicken parm coming from a family that has a hand-down recipe for 3 generations...I tend to dislike more restaurant chicken parms than I like! Biggest disappointment for me is when the chicken parm is undersauced or undercheesed, but also when OVERcheesed especially if not a good, high qualify mozz. I also don't like when the chicken is just a big hunk of chicken breast an inch thick or more with the sauce and cheese draped over it - I like the chicken to be thin sliced breast, well pounded and tenderized, fully breaded with seasoning.
I haven't yet eaten at Bourbon in Disney, but I find it very surprising to hear any mediocre or poor reviews - the Bourbon Steak location near me is excellent, with top notch service, top grade meats and cuts, and all the sides and table compliments are perfectly cooked and prepared. It's been one of my very favorite steakhouses anywhere in the country. I would have expected the Disney location to be just as good - I will likely find out on a future trip soon, but hope the reviews are a fluke or maybe initial mistakes to be ironed out for a new location or new management.
I will say that noise would not be something I would personally worry about - my judgement and review would be entirely on food quality, seasoning, and preparation, as well as service.
