Yay debate! Not counting custom moves, I think Shulk with time will land at the bottom of high tier
at best and at worst will be bottom mid tier. I'm talking when he's mastered on the Wii U version by a top player, which may never actually happen because of low returns for high effort (usually only Japanese players will do that) and if it does happen will take a good while. This is assuming his matchups against top tiers (like Shiek and Greninja) aren't completely one sided and that Green makes his recovery less predictable down the line.
If you perfectly space everything and use the full rainbow (or partial rainbow) as necessary, he has tools that can deal with every type of character which reduces the need for secondaries. He can deal with fast characters using nair absurdly long active of the nair. He can use speed + nair to beat campy/projectile characters (projectile priority is much lower in smash 4 so you can clank most projectiles). His utilt has amazing coverage vs aerial approachers like Wario and Jigglypuff. His nair, jab, dtilt, utilt, and fair can deal with small characters.
The reason I say this is because Shulk struggles to win against almost every character, but he still wins. Some matchups are horrible for characters, even those who are top tier contendors. Shulk may not have as many poor matchups as other characters do.
His major issue is consistency of play and the downsides to his colors.
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Berserker.
Thank you. That was exactly what I was hoping for. A little more insight into Shulk I didn't know before (shield buff is new to me and his DACUS sounds decent) that can add a bit more depth to him. If more Shulk ATs are found then he might actually have a fighting chance of getting up there. Oh and upthrow uptilt with purple at high percents comboing is interesting to me but ultimately not useful because why would I go purple when they are at 100%?
One thing I can't find is: How many angles are there to his counter? I know if you hold towards the opponent(?) he will do a slash behind them or something so I've heard. Like Greninja gets different ones based on direction I was wondering if Shulk had more than two directions he can hold.