Made 5 new accounts with RAF all setup...

[Ualaa]

People who have done the "wrong" RAF chain, have had their links fixed by calling Customer Service.

Different RAF chains can work, it depends on what you want to do.
A chain of: A > B > C > D > E...
Will result in the greatest total number of levels across all of your accounts.

The cascading for the granted levels won't work as well.
You have four jumps, instead of two.
So instead of 2^2 (4) you need 2^4 (16) characters boosted for the cascading of RAF to work perfectly.

If you were planning on running several groups, without the aid of a booster.
Then you'd be leveling toons on A (in sets of five), at the same rate as you leveled toons on BCDE.
So when you level toons... say on ABCDE...
Your set of four toons would be:
A: Druid, Shaman, Paladin, Warlock.
B: Druid, Shaman, Paladin, Warlock.
C: Druid, Shaman, Paladin, Warlock.
D: Druid, Shaman, Paladin, Warlock.
E: Druid, Shaman, Paladin, Warlock.

The cascading of granted levels, would be...
Two toons (from E) to D.
(And two to C, two to B, two to A)...

But then one extra full toon...
From D to C...
(And one more from: C to B and B to A)...

And fractions of a toon (so not maximum level toons) beyond that.

Like before "E" doesn't receive any extra toons.
But overall, there are toons across all of your accounts.

So the:
A > B > C
A > D > E
Is not necessarily the best of chains.
But with a booster toon, I prefer the previous chain to a straight A > B > C > D > E chain.

[Ixe]

Thefunk: Thanks. Definitly waiting before upgrading as well.

Ualaa:
I made the mistake of inviting all my 4 RAF accounts from A. Like this:
A > B
A > C
A > D
A > E

They are all linked on the same battle net ID. You say that I can call Blizzard customer support and change it to e.g. A > B > C > D > E?

This basically means that I'll have an awful lot of level to grant to A. Which kind of sucks as I'm using all character slots on my primary server :-/

Though, I'm fairly sure that I have been able to grant levels between B,C,D and E. I need to check up on that when I get home.

[omgwtfmoo?]

Ok.. So my ABCDE isnt bad, just gonna have to do some hand levelling to bring the toons on A to the full level as the rest. Being how easy levelling is now thats not too bad lol

[Ualaa]

Depending on what you want to do...

You could easily transfer an efficient booster, from an existing account to one of the newer accounts.
Then use the booster, to level your groups.

Not sure your situation or what would work best.
But a character account move is an option.
As is calling Customer Service to change your RAF link method; if you're polite, they can be extremely helpful.