The extra 3sec from T14 4P will change the breakpoints...sort of. Haste breakpoints are determined by a) duration, and b) tick speed. If VT goes from 15sec duration and 3sec base tick speed to 18sec duration and 3sec base tick speed when you have the T14 4P bonus, then its Haste Breakpoints will be the same as SWP without T14 4P (because it is, by default, 18sec/3sec), or, 8085 haste for VT+2.
SWP will change to 6652 (6165) for SWP+2, and SWP+3 will become 12433 (11889), which is well out of reach for T14 gear.
So in short, no, you'll still aim for 8085 haste...the reasoning is just slightly different.