I think you should always state "skeptical of being top-4". That context makes a world of difference when talking about prospects.
LaCombe is a late bloomer? He was a top d-man when drafted, but the knock on him was the level of competition. At the WJC-20, he looked good until his confidence got rocked in the Russian game. Fortunately, the coach kept putting him in as the 7th D and LaCombe showed signs of that offensive prowess in those little bits. After the WJC-20, LaCombe turn up his game and was nearly or at a ppg pace. He turned in a great junior season to where PV tried to sign him. His senior year, his offense took another step forward as he finished 4th in scoring for a defenseman at 0.95 ppg rate.
For the past few seasons, I've shared often how good LaCombe's looked, but often met with denial as well as not worthy enough to be in the discussion of Zell, Drysdale, Minch, and Luneau. To me, LaCombe's playing the same game, but added big hits. I still think he needs to put on a little more mass and close the gap more against puck handlers. To others, they think LaCombe is only showing up now in the NHL - trying to justify their bad take on him all along.
Last year, we had a lot of offensive guys on defense and lack of defensive d-men. It was terrible to witness. This year, we're right back to having defensive d-men (DFD) back on the ice with Gudas, Lyubushkin, and, I'll include, LaCombe. We need DFD to be in our top-4, but it would be great if they can also chip in. Hinds has been improving his offense since his D+0 season and almost finished with a ppg rate last year. He's probably the best bet to being a top-4D as a DFD. Warren has a booming shot, but he's been made out of glass so far. Then there's Ian Moore. He's proving to be a bit better defensively than Thrun last year, but Moore's offense still needs work.
Minch and Loony have that two-way capability and top-4 potential. Luneau playing with LaCombe was an eye-opener for Luneau because he now sees defensive being played at a higher level than him. Luneau started to play a more physical on his end in game 2 or the rookie tourney.