I sympathize, but what you're really talking about is sacrificing good writing for the sake of money and time. It may be necessary, but it's a necessary EVIL. Doing without such a crutch might be painful at first, but I suspect writers could adjust fairly quickly.
For example, if a ship is under attack RIGHT NOW and they're several light years away, your ship isn't saving them without a wormhole drive. So, if you have to write a quick episode, either put your hero ship significantly closer (or even escorting the ship to be attacked) or make the episode about the ship getting there too late and helping out the survivors of the attack. Or just omit the details. Say that the Enterprise is the closest ship, but don't say it's 3 light years away. Say that the attacked ship is five minutes away at maximum speed, and let the fans figure out the distance.