Falln is the only one who's played a high level MK(well not the current patch MK to my knowledge). +2 sounds about right, everyone can kill luma that isn't special but MK is so safe when doing this. DA at early percents on Rosa and Luma creates a win win situation for us, if Rosalina tries to airdodge Luma will extend the hitbox of F-smash and both of them will get hit, Rosa tries to nair she will get hit why? Cuz it starts from behind her, she has no frame 3 aerial, her only option is to jump but mk wasn't aiming for her he wants luma.
We can kill her early af(as Amadues has shown) but our main priority is taking Luma out. It is not hard to get past Rosalina's walling, drill rush is safe, DA is always a good option and Caping a jab happy Rosalina is a solid punish. When Rosalina is off stage she is free, but our biggest advantage is the fact that if you're on the ledge you will ALWAYS lose Luma, MK just has to hold jab and if you do any get up option you lose Luma.
MK strips Rosalina of what makes her dangerous, our recovery is too good, we have better ground mobility thus prevent Rosa from camping until luma comes back, better frame data so even if she engages us we will come out ontop, strong disadvantage state with multiple jumps and cape.
Our advantage state is absurd there's no reason to go over that. MK really has nothing to fear, even Dabuz could barely beat a 2 week MK by Mr R, who missed all his uair to shuttle loop options.
Customs don't matter much, you won't see a MK in customs but the ratio stays the same HSD makes this MU so braindead. A faster Drill rush in start up and travelling speed, still safe because of Luma and kills Luma from the half way point of FD.
By Katakiri