Miles to go and height.
G/S can be very misleading, although I believe it makes you feel low while you are on base. not because of the G/S plane which, if I recall correctly, tends to bend up to the sides. But because in base you are going to fly more miles than the distance to the runway. Many follow it and later realise they are low.
At 4 NM though with 30º interception, things can be different because the track miles and direct distance miles are practically the same, so G/S should be a good reference to use along with height-miles.
That is a pretty tight vector I wouldn't accept in IMC, except maybe if I don't feel pushe by anyone, with a low enogh radar minimum vectoring altitude is low, I have "the beast" under control in speed, configuration and profile so as to be stabilised by 1,000, checklist read and trying not to forget to obtain the landing clearance. Personally I think that if such manoeuvre is not planned, there is little or no saving at all compared to a 6 NM final, for instance.