Why on earth are attributes capped at 17? usually they're 18, or 19 for that +3 bonus.
This is 5e.
Currently, the system being used is Point Buy, which has a cap on 15 in an attribute. You can get up to +2 from a racial bonus, hence, 17.
However, there isn't really any point in having an odd value in an attribute, unless you plan to take a feat which adds +1 to it, so it might be better to reduce that to 16 and spend those saved points somewhere else.
