When the panel is at the top or the left and the context menu is opened for an item, the first accessible entry is 'Properties', which of course is the most important entry so it should be the first, but when the panel is at the bottom, the first entry is 'Panel >'. So it would be good to sort the context menu in reverse order when the panel is at the bottom.
Actually I know no plugin apart from whiskermenu that does this. If you add e.g. the panel-internal applications menu plugin, you'll see it sticks to its order of things. I also doubt if this is really always more intuitive for everyone. The other perspective is: the menu always looks the same, no matter where the panel is, so you'll still find things where you expect them. In any case, it sounds like a lot of code to add for very little gain and it's not like we have lots of people writing (or more importantly: maintaining) code.
Created attachment 9555 context menu Just to make sure that we are talking about the same thing, I'm including the screenshot of the context menu. I wasnt referring to the menu that appears from clicking on menu buttons in the panel.
We have the same understanding of what the context menu is, so there was no misunderstanding.