That is the range to worry about and that can be solved by either opening 1N or jumping to 3N over 2D, it's not really such a huge probelm.
Maybe I shouldn't use "auto-open" what I mean that many hands in 15-17 range don't open 1NT.
I don't like jumping to 3N, two things which are important is to check for 3card support in responder suit and for responder to show support in opener's suit. If you jump to 3N there is no space for that anymore.
If it goes: 1S - 2D - 3N you run out of bids because you need:
a)some bid to show slammish hands with S support
b)some bid for slammish hands with diamonds
c)some bid to show D+C two suiter
and it would be nice to have cuebids available with spades as trumps too.
it's not really such a huge probelm.
I am not saying it's huge problem
I asked if "2/1" implies opening 5M-3-3-2 with 1N because if not then it's not clear to me what 2N in OP is. Then I made general remark about this sequence expressing opinion that bidding 2N with 12-14 is inferior to bidding 2M which you seem to agree with, at least partially. I am not making huge problem out of it I am just saying.
you'll see that many of us think 3♠ shows good spades, weak clubs, and uncertainty about the right strain.
It goes against basic bidding principles to first bid NT and then look for stoppers instead doing it the other way around imo.