If LHD is the BPA, you pick LHD. That's it.
Not with their 1st round pick (assuming its top 15).
There's 0 room for Cole, so why would they draft him?
LD:
Guhle
Hutson
Engstrom
Xhekaj
Harris
RD:
Reinbacher
Mailloux
Barron
These players all have top 4 potential and are all 23 or younger.
Lane Hutson - Reinbacher
Guhle - Mailloux/Barron/Engstrom
is expected to be the habs top 4 for a long time.
If you're drafting Cole, then you will need to trade him, but if that's the case, then it would be better to just draft a forward with that pick instead.
Furthermore, the habs need more high-end forwards. So in terms of team building, drafting a potential top 6 forward is very important, and drafting a potential top 4 defenseman is extremely unimportant.