Probably not needed, roundabout was giving correct instructions now that the tiles have updated to my last edit (for now) 
Having the roads connected at the same point on the roundabout allows the illegal exit turns to have red arrows (this is how the roundabout was set up before I changed it). What I’ve done is move the exits to stop Waze from considering it to be a ‘normal’ roundabout (all the exits at either 0/90/180/270 -/+ 15 degrees from the entry) so that it no longer gives a turn left instruction to go straight ahead.
My first change showed that exits within 15 degrees of the entry are still considered as ‘normal’ and that Waze doesn’t understand that the second exit from a roundabout can’t be called ‘left’. All the previous discussions I’ve found in the forums only considered the 90/180/270 degree angles.
My second change aligned the roads to the aerial photo but still moved the exits out of the ‘normal’ angles, however, I forgot about the part of the routing engine that disregards turns that are considered too sharp (I knew about that restriction on normal roads but wasn’t sure if it would be applied to a roundabout)
My last edit simply reduced that turn, however this means that the exit doesn’t line up with the aerial photo, so a new editor may decide to ‘fix’ it, thus returning the ‘turn left’ instruction.
There is one more option, that is to make the first geometry node of the segment follow the roundabout, then double back to the actual exit point making the map line up with the aerial view and avoiding the sharp turn penalty (this doesn’t seem to be applied mid segment, only at junctions. I’ve had to fix crossroads before that said to ‘turn left’ instead of ‘turn right’ due to the segment passing the junction, then doubling back to it).
I’m using a modified version of the ‘Roundabout Angles and Landmark’ as the original uses -/+ 30 degrees, doesn’t draw the angles for a 0 degree exit and won’t show the angles for a roundabout junction with more than 3 segments. 
There’s also one more possible quirk that I can see possible. Waze may consider a roundabout to be ‘normal’ even if there is more than one exit in the same exit area. But I haven’t set up a roundabout to test this yet.
/end of rambling explanation/