He really needs dolphin slash hitbox buffed. His recovery is going to be wayyyyyyyyyy too abusable when it's common knowledge it doesn't pose a threat to challenge.
If these hitlag modifier strikes on shield have been altered in the latest patch like it seems to have been (check it out?), that would've made marth's tippers safer on shield passively without extending the combo-strength, this may explain my down tilting for people's get ups at the ledge being so ridiculously safer than expected. A few more frames off our aerials (in particular fair) and we'll be a lot closer to being a combo demon (limited by not having solid auto cancels).
Right now he's still a little undertuned with his current specs, stuff like the auto cancels, grab game (although it isn't bad), bad recovery, damage values (+minor but lacking anything sub 5 frames) are likely going to keep him in check from being a super menace (he still has average/terrible dash attack and down smash too). All of these are kinda unlikely to change as a whole, at least we're not too sure they know completely what's "wrong" with Marth, although they seem to know what can make him silly (making fair to tipper fsmash easier). All the things super-good to change [structurally] haven't not been done yet; Zard has had his throw lag reduced, Ike/Bowser/Diddy have had animation based tweaks, Ike/DK/etc has had speed up (dash attack/fair) and auto cancels given (fair), they've made sword hitbox adjustments on MK and Shulk [IIRC] to help match animations.
Either or, doesn't matter, he's getting stronger.
Ramin was one of the best Brawl Marth's fyi, top 8 at apex/etc. Brawl Marth and Smash4 aren't that different, I doubt Ramin would've been that inadequate in the "match up". What got him was clutch tipper forward smashes*, stuff that I doubt someone of Ramin's calibur will have work on a player basis more than once (Nicko in socal had a close set with ramin 2-1 in the past too).
* and this is why it's so dangerous to buff this character the way they have been (I mean the current stuff isn't breaking him nor would it break him if other things got touched). Perhaps they'll look at him structurally more next patch as they've done a few "sweeping" buffs with him thus far.