@Anyone complaining about timing.
The fact that you spent FC right before a scheduled variety event is not anyone's fault but yours. June event list was released a few days before the update so you could see that variety is the first one up. Even if it wasn't released, if you don't have a massive pile of FC but want to complete challenges, you should wait for it. Your inability to think ahead is no one else's problem.
Stop blaming developers for every little issue you have and focus on giving feedback that actually relates to gameplay and not your lack of thinking.
If you actually used resources that developers provided, you would say the timing of this event is perfect because people who want to buy NotB and Osiris don't have to wait the whole month for a variety event but only a day.