Now going to throw my two cents in.
Jared Bednar
Surprise: Eric Gélinas - He is that type of defender who has all the physical tools to already be a solid addition for any team, from mid-pairing to bottom on the most contending ones. Yes he some flaws in decision-making, but I think Bednar and Pratt will both be better teachers for him compared to what he had last year. I don't expect him to dishing out bombs like Ryan Wilson did, but I don't think it's out of the realm of possibility to develop into a defender like him (a solid 4th) IMO.
Disappointment: Mikhail Grigorenko - Honestly, this was hard to choose because I could see multiple options who could potentially disappoint. Not because I expect all those players to, but because of all the unknowns which comes with a new coach. A new coach who will have less time to get the team ready, especially for a season which has the World Cup taking place within it as well. I personally think that Mikhail had a very solid season under us, but from all of those players, I think Grigorenko is the one who has the most potential to hamper his progress. I believe this, as he's a player who needs to learn from his mistakes from a firsthand experience, he's a player who has the talent, but doesn't have all the intensity to match it. Considering that Bednar is an even-keel coach who bluntly tells you the truth, I can't see him having a long leash in some of his inconsistent play as Roy did in the past. Though with that said, I think Makhail will either go down either one of these two paths; he will listen to Jared and fix his mistakes becoming a solid top 9 player. Or he starts feeling sorry for himself leading him to eventually being traded away for another project or leaving for Russia.
Wildcard: Nikita Zadorov - He's definitely one who will either have high, high's or low, low's this upcoming season. Let's hope that he gets some great coaching and learning aspects from not only Bednar during training camp, but Foote and Pratt as well.
Eric Veilleux
Surprise: JT Compher - With the addition of Ben Smith, I think the likelihood of him making the big club decreased quite bit. Then factor in that I thought he still needs another year of physical development from what I saw at the prospect camp. Whatever the case is, Veilleux seems like an offensive coach who like Bednar, focuses on a solid forecheck and fast transition game. Both of those aspects are some of J.T.'s greatest strengths, then consider his age and maturity, I think he's going to start in the top 6 and finish the season there with solid numbers.
Disappointment: Troy Bourke - Like Hishon, I don't think it's entirely his fault from what happened with him. He got a coach who thought he was pretty much useless and was back and forth in and out of the lineup. I do think that screwed up his development, but more importantly his confidence. I know some posters probably always forget about him, but from me watching him in the WHL, I saw the potential he had. Not really as a top 6 NHL forward, but I think he could have become a solid two-way secondary scorer. Whatever the case now, I think he falls out of the whole organization as Meurs did and finishes in the ECHL being an afterthought.