You are wrong on this actually, first off, Snake's crouch is 3 frames, meaning it would be 9 frames to crouch and buffer d-tilt. Also, no characters need to crouch to use d-tilt, I'm surprised you didn't know this as a marth main. It is the exact same this as doing an u-tilt with tap jump on, just slightly hold control stick down and press A.
So snake's dtilt comes out on frame 6, same frame as his utilt. You can't react to that lol.
I probably just assumed you had to crouch first because when I play as snake and I dtilt he is literally crouching and I assumed it applied to other characters. I didn't realize that you didn't have to. I admit I was wrong then
that being said If this point is incorrect my other 2 points still stand
marth is an aerial character and tends to be in the air, unless your telling me that dtilt has giant hitbox in the air its uses against marth go down.
and like I said before, show me a video of a decent snake that uses dtilt when he wasn't already crouching.
We could sit here all day (or night in this case as of right now) discussing that you can use dtilt to ko marth, which if its at 130ish percent you can which I agreed on earlier. and that YES its good when you have staled your utilt these are valid facts I won't argue against . What we SHOULD be debating now is how to fight the CURRENT snake metagame which currently doesn't involve Dtilt. If snakes start using dtilt as part of their metagame because it is a BETTER option that is different until that happens It doesn't seem prudent to me to continue discussing it.
edit:after watching vid it didn't disprove my points
(I am refering to when you killed albert with it) You crouched before dtilting , not for very long but you were when you took the stock, and at that period of time Dtilt wasn't a better option as you hadn't decayed utilt on that stock.
you did however dtilt without crouching earlier but didn't hit because marth was in the air above you
http://www.smashboards.com/showthread.php?t=258332
further more dtilt does not have more foward range than utilt or if it does its barely any however I don't personally see dtilt have more range based off this picture, infact the opposite . and as said before isn't hitting marth in the air.
edit picture could be wrong, but Dtilt's range isn't omfg longer but it does have some moderate uses