Par 6 holes

There used to be a par 6 of 735 yards at Bright Castle, near Downpatrick here in Northern Ireland but it's been trimmed back to a par 5 because par 6s aren't compatible with the handicapping system, apparently.
 
Why nor par 7's or 8's - will the madness never end? Getting a 6 on your card goes against everything that's good in golf, par 5's are long enough.
 
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