New XPS 13 3970 wifi connection issues

[Jules23]

So I just bought a new laptop as I've had my old Toshiba one for over 5 years and it was sort of falling to pieces. I just recieved my new Dell XPS 13 3970 (the new one for this year) but when connected to the internet, it shows far less bars and drops out more often than my old Toshiba (and i have them in the exact same place). I'm concerned that when I go back to uni I will struggle to connect to the internet at all. I know this might have something to do with the Killer wireless card and I would prefer to just change it to the Intel one (I think that's what it's called) but apparently they've soldered it on to the motherboard. Do I have to go through the whole process of uninstalling and installing different drives and whatnot, or should I just return the laptop, live with the restocking fee and delivery fee, and buy the older version in which i can just replace the wireless card?