As far as the "fetching profile" issue is concerned. I almost always get that the first time I try to sing into Multiplayer. If it takes more than five seconds, I dashboard, then just load the game back up. fixes it every time.
I've also noticed what seems to be a bit more lag lately, though it's still minuscule compared to previous games. Dunno if matchmaking has been a little wonky or what, but give the variances between my matches, I know it's just me being stuck with a less-than-ideal host. I know perfectly well when I get outplayed and have NO problems admitting it, but when I start unloading on someone, and the kill me before they've fully turned to face me, something's a little off lol. This BARELY happened at the beginning of the game, and now is almost a 50/50 occurrence for me some days.
Maybe more locals (I live in Missouri, USA) have been migrating to the Xbone? Who knows? I still enjoy this iteration of CoD the most! HIT DETECTION WORKS!!!