[Shulk]
Initially I was very underwhelmed with Shulk. He felt just like Brawl Ike to me, except he had a poor Fair zoning game due to the lack of a C-Stick (jumping backwards and using Fair is hard without it), and less kill potential. However, as I started to explore his Monado stances more, and as my understanding of his range and startups got better, I started to see the potential in this guy. His best tools are definitely his Ike-like jab, OOS UpB, Bair/Fair spacing and smash attacks. Oh, yeah, his counter is decent as well.
When you know the order of the stances (jump, speed, defense, damage, power), you can tap B really quickly and get to the one you want easily. The stance-change animation can be cancelled by inputting any other attack, too. I usually start the match with either the purple (damage) or blue (speed) stances. Purple is for obvious reasons -- his three-hit jab combo does about 12%, and other tilts/aerial moves all do more than 10% per hit. It's not hard to get from two to three jab combos and maybe a Fair or Nair with the stance up, giving you a very nice lead. The blue stance, however, is great against projectile spammers or shield-happy players. What it allows you to do is to run past your opponent before they can react, and either pivot tilt or pivot grab them. It's an amazing, amazing mixup, and very hard to punish. When you get them to about 70~90%, it's a good time to switch to red (power) and punish rolls with your smashes or bait them into an OOS UpB. The second hit from your UpB is so strong with the power stance, KOing early.
I think players who make good use of the Monado stances will be really rewarded. Shulk is fun and strong, and I feel he's pretty good. If you're excited about him, you're directing your excitement quite well!