Such strong emotion on that mare, good capture of emotion on this piece complete with thick shadowing to further enhance her facial emotion and also further high lighting the character, great work atryl.
: "The path of Loyalty is never without difficulty... Never without sacrifice... Never without loss... But I follow this path, regardless. Loyalty, Honor, and Friendship... That is what I fight for. Some may think I'm selfish, But this is the only path I trust... This is the only path I follow... This is the only path... that exists."
Methodically speaking, it hasn't changed much at all. Materially, its acquired weapons of the same nature but with improved mechanics... And that's Rocket Propelled Grenade. Missiles have computers integrated into them, rockets do not.
If I may give my 2 cents, this looks awesome so far! I like the dark/mature context. Please finish it! Your work is unparalleled. Maybe you'd consider doing the rest of the Mane 6 as fantasy characters as well? Twi as a Mage, maybe Fluttershy as a Druid or Ranger, etc. That would be pretty awesome given how great this looks.