Good question, I have a HP 15-p and was going to do the same, the wireless on 2.4GHz is pretty woeful on these.
So it seems like you can put in a Intel Dual-Band AC7260 + BT card, however this requires two antennae. Your laptop probably only has one.
However, from what I've seen, there is a bit of dead space inside the laptop between the motherboard and the DVD drive. You can mount a second antenna there (making sure not to touch the antenna with anything else) which will allow the use of the dual band wireless card, and it doesn't mean ripping the entire display apart as well. Of course, you have to make sure the part number is that of a HP wireless card, not a generic one.
I will be trying this out myself soon as I need to upgrade my 15-p189na.