Ben,
If you have seen and know the CL site well, can you tell us what is so "sensitive" about it?
BTW, the argument that Niall and others have made was that the Balmedie approval was wrong because it was narrowly turned down by a single local committee with a tie vote broken by the chair who was/is a member of the Green party. That vote came after another local committee gave the plan a super-majority approval. The feds called the application in and reversed the vote of that second committee.
CL had local popular support and formal planning approval. Whereas the scale and scope of the Balmedie project had national implications, CL by comparison was rather modest, but with considerable local impact. The feds stepped in anyways and reversed the favorable local decision.
This is not a matter of a small inconsistency or a system which falls a bit short of perfection. It may have been as simple as a make up call in basketball (for Balmedie), but it was a colossal screw-up nonetheless. As several people much smarter than me have said, we get the government we deserve.
BTW, best of luck on your new project. I hope to play it some day.
Lou,
I have not been to Coul Links however SSSI in the UK and NI is briefly explained via a wiki page -
https://en.wikipedia.org/wiki/Site_of_Special_Scientific_InterestThe golf course I have worked on in a SSSI has been opened for play for over 12 years (with a few in-house changes without my input

)
The two SSSI sites are contrasting the one I worked on was on farmland on the shore of a huge man made lake not 50 years old which was near a nature reserve which made the surrounding areas by the lake an SSSI - compare this with Coul which has 100 years plus of natural sandy dunes with loads of flora and fauna. This is one inconsistency of interpreting SSSI's
The other inconsistency is planning - we do a lot of work with planners architecture and golf course wise however the local planning committee (who are non qualified planners but councillors representing the local people which is political and local/national planning policies can be 'thrown out of the window'). For example I had a 11 unit apartment block which the design evolved and lots of dialogue with the local planner to solve a number of issues and was recommended approval by the planners and it barely got through the planning committee by 1 vote (5-4)
Planning can go to several levels - local, mayoral, national/government/minster and then prime or first minister level Coul Links was refused at minister level and Trump Aberdeen was approved at first minster level which I had reservations about plus the then first minister is currently undergoing a major court case which has been in the national news

.
I echo Niall's response which both CL and TA were carried out in due diligence from a planning standpoint however one was rather corrupt.
The other downfall is the client and designer probably didn't go down the right route and thought that they could get planning a la the 'Trump way'. The best route in theory would have been constant communication with planners and other steering groups to get their support/on their side rather than enemies that they are not to impede the most sensitive areas and build around it plus follow local and national policies. It is a game and it is all about ticking the right boxes which if refused would more likely to get approved through the appeal process.