For a single activity, it's still as easy as ever to change the event type of an activity record using the Activities widget on a dashboard. The only real difference now is you don't get to visually scan and/or scroll through twenty activities at a time (using the list on the Activities page) to quickly get to an activity that is not all that recent and then change its event type on the spot – but I don't think it actually requires more clicks now; you simply have to look for the particular activity first and click on it instead on Quick Edit, to get to where you can change its event type.