Something that I've noticed from having spoken to a few other transwomen, the voice is something that becomes perfected after a while 0_o 3 transwomen i asked about voice training told me this: "I use to worry about my voice, but now (x) years later... my voice is pretty female and I wasn't getting any voice training, I just kept speaking in a feminine tone and feminine pronunciation and eventually it kinda just stuck, now its my natural voice"
So I guess sometimes the more you get use to speaking in a female pitch and tone, eventually it kinda finds its home in your vocal chords :3
As for FFS; from what i've seen, i think its good to let the hormones do a bit of work on your face and cheeks and what-not to see how it rounds out your face and softens your features before opting for FFS, because from the transition videos i've seen (that to my knowledge do not include FFS) the face changes SO much just on hormones alone... not to mention that there are small details that can shape your face drastically such as; head hair, eyebrows, facial hair (whether its minimal or extreme, sometimes just a bit of shadow can change the look of a face so much), weight loss, weight gain, etc.
I've only been on HRT for coming up on 4 months and according to my mom my nose has shrunken in width

meaning my bridge has slimmed... didnt even know such a thing was possible, and i don't know how to use contouring makeup techniques yet so I know it's not my make-up lol.
Soo honestly, i would put my cards in the GRS table as well... and consider how lucky you are to be getting miss'd and ma'am'd as much as you do... I still get misgendered often and get ma'am'd about 45% of the time, and I cant for the life of me see a male ANYTHING in my face OR body... at least not something that says "this person is obviously male!" And if you get Ma'am'd over the phone too (considering that phone speech is muffled and changed to a different pitch or tone sometimes)
Its still early on for you xD by next year you might find yourself doing away with some of the decisions you think you need to make. I actually envy your cheeks... you have more cheeks than me >_< and your chin is cute and small. And from hearing your voice, it sounds fine to me and just needs a bit of fine-tuning. Granted; if you want to have a voice you can effortlessly use, then go ahead and get VFS

but you'd be surprised what your voice can get used to the more you practice...
Example: I use to not be able to reach notes in the range of Paramore... it was a huge struggle for me, and after having practiced singing paramore for a few months constantly in my car ~ fast forward to 3 years later and I'm singing things in a much more higher pitch; so much so in fact, that i can't sing paramore anymore because its too low for me LOL. Your vocal chords are like muscles, they can change and adapt to new things just like any other muscle in your body.