If you have a really laggy connection; Then there is something wrong with your ISP or other people are using all the banswidth available. I can imaging ED servers being more busy but I can not imagin people gaming on a connection with so little bandwidth that gaming is inhibited. You need max a couple of mbit. Not sure how if there is a big impact on your geological location tho.
Also ssd or no ssd should have few impact on gaming performance as the game should be in memory and not being read from disk. Tho to really answer this question one needs inside Fdev info.
Yeah, that's exactly it. I notice when I'm playing later at night entering/exiting supercruise takes max 2-3 seconds, usually less but when I play early evening and my son is downloading game updates and my wife is using her laptop, exiting supercruise can take 5 seconds plus.