So, I thought it would be an interesting idea to tune with modulation! I think the result is quite decent.
Here's what it looks like:
How to tune with modulation:
First, you'll need the plugin pitch tracer.
DL for pitch tracer: http://z-server.game.coocan.jp/utau/utautop.html#pitedit
Step 1: Clear all tuning.
Step 2: Select a section of notes you want to work on.
Step 3: Open pitchedit.
Step 4: Adding modulation.
Click MOD
These are the settings I used for this cover:
Step 5: Correcting pitch, adding tuning.
So the tuning will probably be off pitch for some samples. To improve work flow, I first correct all the off pitch samples.
Now that the pitches are mostly correct, I use the beginning parts of modulation to give me a guide as to where the consonants and vowel endings are.
And bam, you're done. Listen and refine accordingly.