Yeah the time thing's coz I'm still on hols waiting for uni to start. He he...
I do know my way around just about every character in SSBM but one stands out from the rest - Peach. She just drives me crazy.
Yeah the rank system should be well thought out. The ranking system in MKDS is a bit shit coz it doesn't really allow you to choose who to verse against and one time I vsed a pro snaker who beat me by miles (altho I can snake, he just does it too well to be called 'good' snaker).
You're complaining about Marth's grabs? Try a different direction instead -
Up throw, grab, up throw, etc (for fast fallers) into a Fsmash or aerial.
Up throw can lead to the standard up attack (not up smash)
Fthrow, grab etc into any attack for floaty characters. Very good against those who don't know how to escape the Fsmash after the throw.
The only character I find that I really can't chain grab (in any direction) is Link, Pikachu (except on certain percentages), and Ganondorf.
FYI Most Marth Players rarely use Dthrow unless they're trying to be unpredictable. Actually, the only time I really find Dthrow useful is when ur throwing him offstage and then tipper him into a Dair spike. (Again that's situational to be used.)
The Comrades tourney is in Australia, unfortuantely. Since you live in America, I'm sure you'll find heaps of SSBM tourneys in your area. The site to go to is smashboards.com