It wouldn't take much to add the dynamics... as I mentioned a key or even tempo change is easily achieved within BIAb before exporting the tracks to your DAW.
The minor pitch issues are easily achieved as well - most DAWs have a variant of Autotune which can be employed for one note or an entire song.
Additionally i don't think it would take much for you to simple retrack those phrases.
Qualification? None needed. A simple I liked x and how did you do y? That's sounds like fun, that reminds me of etc.- are all well received. In fact most folk are after a nod and a thumbs up more than anything else.
"What's so funny about peace, love & understanding?" - N.Lowe