Nope, because spell tokens does not auto 'target', you need to use 'critically awesome' for that.. ( I'm not sure how up to date it is..)
And I dont believe in auto target like this... because it 'could' auto target NPC and PC and you have to go and un-target the over targeted selection... ( Fine for fireball which hits all, but other area effects have selectivity at cast which I'd have no info to deal with.. )
As the DM as long as you dont have any other token selected on the map, as the combat tracker moves around the system should make the current creature the selection item on the map... and then once you drop the spell token on the map you should be able to 'ctrl+left click' the targets you want.. even if they are under the spell token... with a few clicks. ( assuming you dont have loads of players in an area !! )
It can 'loose' the focus for the npc on the map ( VERY PROBABLE when you drop on the spell token )... you can re-select as long as its not under a spell token by clicking on it on the map as normal... if its under a spell token ( Why are you casing a fireball on yourself !! ), make sure you clear any map selection ( red ring on the npc map token ) and you can then use the combat tracker by clicking on the npc token image which will re-select that token on the map and then you can use normal ctrl-left click to update the target list. ( Or use the combat tracker 'target' box to drag around the combat tracker etc.. )
Yep its still a 'pain' in some cases for the DM... but I am trying to reduce this as much as possible without the require API fix it is always going to be a big compromise...

