A lot of times, i personally haave had issues where i forget to utilise certain abilities of a joker during a round. For example:
Using the effects of trading card joker before discarding multiple cards at once.
Or, using Vagabond to maximize the tarot card making.
My suggestion is to add some sort of indicator to these types of jokers, maybe it says "ready" underneath the joker to show it's effect could be applied, so people like me don't always forget to use the joker effects.
However, I am well aware that this may be a skill issue on my part and Thunk probably wants the players to be more attentive to the gameplay, so adding it isn't a huge deal.