I suspect there will br 4 fly-halves (Farrell, Ford, Cips, Myler) in the overall touring squad but that only two, Farrell and Ford, will part of the '1st XV' while the others, after the first test, are involved with the midweek squad. I wouldn't be opposed to Goode being fly-half cover, if that means someone else can take his current slot as replacement fullback.
I think the parallels between Burns and Ford are really interesting. Back in 2012 Ford was being hailed as the next great English fly-half and a lot of people were dissapointed that he didn't go to to South Africa. The same happened to Burns in 2012/13, with a lot of frustration that he was only on the fringes of the England set up.
Ford suffered a bit drop in form in his last season an Tigers but has bounced back after moving to Bath and is now our second choice. Burns is currently in a monumental slump but is moving to Tigers (ironically) and there is nothing to sugget he can't turn himself around like Ford did.