I use the OmniFocus system which basically slaps everything I put in their reminder/ project lists and adds that info to the other two calendars I refer to the most. I used easy calendar a few years ago and appreciated the ease of use regarding this calendar and I did use it mostly for quick entry, not as my main calendar. Just checked it out after the new update last night and now instead of that annoying blue (I hate basic blue) I find I can customize the colours, have a dark theme and colour tags, increase font size and resize the calendar's windows. And now, you can actually change EasyCalendar icon colour, which is very cool. I only have one other app that has implemented that feature, so far.
Anyway, what was once just simple, is still that, plus customisable, useful and stylish.