Is it worth upgrading to this WiFi card?

This is a noob question.

I managed to boot High Sierra on my Acer Aspire E1-571-6854 but wifi was very slow (around 100kbps of download). After reading Dortania's guide of supported cards, I have seen that a BCM94322 is supported and was wondering if I would get good wifi speeds with it.

Current laptop specs:

CPU: I5 3230M
RAM: 6GB
GPU: HD 4000
Wifi card: AR5B125 (AR9485 chipset)
Install method: Opencore

Is it a good idea to buy a BCM94322?