Yes - you are right - I miss te new features!
But - perhaps you remember - I have my very own 'marvelous features'
My "flexible fields" work like a charme! As much fields of different kinds as you like.
Further more I can assign special functions (duties or responsibilities) to users for events and even can get a duty roster out of the calendar
When I read the last problem here in the forum from we32 about overlapping of some categories and his usecase for some kind of room reservations, I was thinking of my flexible fields, which would serve such things very well...
But I'm afraid of "releasing" my version in some way because of being only a "hobby programmer". Maintaining such a project feels to risky to me. And most of all: it is still 5.2.1
Whish you "Happy Coding" for the new version!
Stefan