The way i see it, we realistically have a collection of two #2 type guys and two #1/3 type guys in some respects. Garrison, Hamhuis and Edler, Bieksa respectively. While it would be nice to have a true reliable #1 guy, that's obviously not in the cards...very few teams have that. And having the kind of top-end depth outside of that, in 4 guys who can all play at a very high level, is not the end of the world at all. There's absolutely no reason we can't win with the guys we have...but it will require some luck and specifically, we have 2 guys who i think can play stretches at the sort of level of a #1D who truly dictates the play...one of those guys has to step up big.
Those two guys to me, are Edler, and Bieksa. With Edler, we've all seen the potential there. When he's playing well, he's awfully close to being a true #1D, who can be leaned on in all situations, and most importantly, can really control the game. That one's pretty self-explanatory.
The other one, I know it might sound ludicrous given the way Bieksa has played this year...but when he's in a groove and going 'beast mode', he is virtually indistinguishable from a #1D imo. He is capable of playing the toughest minutes, while dictating the tone and pace of a game. We saw it when that HamJuice pairing started to really click, and into the playoffs that year. It's what rocketed him from 'universal whipping boy, good riddance' to 'omg we must sign him!!!' And in that sense, in some ways he's probably the closest thing we have to an actual #1 Defenceman. When he's good, he is absolutely 'the straw that stirs the drink' so to speak. It's the fact that he far too often (this entire year for example), plays like he's off in lala land, at which point he looks more like a bottom-pairing guy a lot of nights, that clearly holds him back from being a #1D. There is the ability and upside there, but there isn't anywhere near the consistency and reliability of a #1D.
Hamhuis and Garrison to me, are firm #2D types, for almost the very opposite reason to that. They both tend to be very steady, very reliable, very consistent. But neither of them has the ability to completely take over a game from the back end. It's what makes them 'complementary' pieces, as #2D. They're good players...but they're not tone-setters, they're not 'impact guys'. When they're most 'on their game', you're hardly noticing them...they're just logging big minutes without event.
And that's essentially why i don't particularly like the current D-pairings. It's sticking the two 'steadying presences' together and asking one of them to step up to a role they're not comfortable/capable of effectively managing as a dynamic presence. And then it leaves our two most 'volatile' but also our two most 'dynamic' defencemen together, asking one of them to 'calm down' and play a 'complementary role' where they don't appear overly comfortable of capable.
It just doesn't make much sense.