You mean when someone loses a worm before his first turn or something else? Why more sense? Remember selects have 4 turn delay.
No no. I'm not quite sure whats exactly wrong with having selects (maybe nothing), but it's heavily related to snowballing and turning the game one-sided during that mid-game phase, but again, changes like this needs to evolve over time.
As of islands and selects, I might be looking into it from the perspective of Intermediate player and it makes sense to have other means of saving yourself from easy setups for a kill, which isnt as easy in a tight cavern play. And it could bring even more dynamics to island t17. AND AGAIN, testing. Not saying either is correct, it's just the feeling.