to make an event (even the simplest) 2 guys set in a faction that runs in a thread every xx minutes by registering with a voiced command (.join .leave) or an npc button and add them on an array list or remove them from an array list and all this can be maintained easy with a gameserver/voicedcommand addition few setters and getters in player and some checks (example teleport and die())
Your point is invalid in so many ways, because in any acis version upgrade you make a patch of your changes and if a class/method rename is done on the upgrade you just apply and adapt (a rookie can do that), about the developers that don't answer you probably don't have some honey to lure them, lets say you do something professionally (it is your work) and somebody ask you to do an event how much you think it should cost? 20-30 euro for a pvp event? you're wrong maybe in asia or brazil, he will probably spent more than 2-3 days this means work hours how much you get in your country for this days? 3 days in my country might cost 100 euro you want? i can make you an event for acis and each upgrade of acis cycle will cost you by hour, what if you refund me? i lose event, work days and money, give me a good reason to work with you. is it worth? no. go search how to adapt how to make something google has 11235123515 tutorials and stop wasting time here crying like a kid you just make your self look stupid.