SafetyFirst
When a threshold is displaced it's either permanent due to an obstacle or temporary due to WIP or temp obstacle.
When the Glide is steeper than 3 degrees it is due to again similar reasons.
In any case the above items are a Threat and this is proven by the fact that they are included in NOTAMS, Route Manuals and approach briefings.
In my opinion if Geography, surounding buildings or WIP for improvement of an aerodrome can be reasons for those adjustments, revenue and profit should not.
Let's NOT create a hole in the cheese model....not when there is an other big one lining up, the one that is made by the 90 plus hour, night, multi time zone duties....
Ynot.