I had to delete some apps, music that I downloaded and had stored (I can still play it though since it's automatically on my iCloud) and send ton of my pics to Dropbox so I can make room for the iOS8 upgrade but I was told on another forum if you upgrade your devices through iTunes and connect your iPhone or iPad you don't need as much memory.
I do agree that Safari seems a bit slower on iOS 8. I do hope they fix the problems on IOS 8.01 soon, I ordered the iPhone 6 and it should arrive on Wednesday. I do hate that Apple charges so much for memory, I'm glad the new phones have 16gb, 64gb and 128gb but it's ridiculous to pay $100 - $200 dollars more just for that while other phones you can just buy a memory card if you need more space, I got the 64gb so hopefully I won't need to buy space on my iCloud (and with recent hacks I'm not too comfy storing many things there, specially passwords and credit card info since it only requires my 4 digit pin to look at all of them through my device) I do look forward to the fingerprint scan, well kind of.
I hope the iPhone 6 isn't that big, I'm so used to my smaller phone and the weight it has, Im always tempted to throw it at something a la Naomi just because it fits my hand so well.