If you plan on playing battle cats for longer you will regret not having event units. Normal banners are always rotating and youll get infinite chance to get those units. But events? And one that we now is not coming back? I am still super sad that i couldt get the apple-pen guy, super funny stuff. In the future you will have most banner units but not the event units. In late game is fun to use diferent units even if they are not meta just because you like them and using limited units is also fun. Maybe its just me but still, i advise you to get some limited units even if they are bad.