Useful diagram. The blue route you draw is an interesting one: you assume anticipation of the TGO (fly-by) for the REUTL4A arrival, but not for leaving the hold.
If you allow similar anticipation, and scale the size of the hold to reflect the radii you've drawn, then there are a number of other possibilities. One is to make a left turn from the
beginning of the inbound leg, but then one starts to ask "why not simply roll out of the inbound turn on a heading of 300?" Which is not so dissimilar from the green route!
If you don't allow such anticipation, the blue route is not so far away from the red route.
If you draw the same diagrams for the LBU hold, I think you'd be hard pressed to reject that 52 degree right turn on to the initial approach 230 track. That's much
less extreme than the turn from the BADSO1A arrival. But one can keep finding examples of such holds at different angles (take a look at EDDF), so where do you set the limit? Is it "30 degrees max or you must manoeuvre in the hold" as for a course reversal? But there's no mention of that in PANS-OPS.
You can see why RNAV/RNP is so popular...
