***Before you read anything I am about to write, be informed that I only have a post spawn (very little of it), summer and fall's (very little) worth of experience under my belt.***
Unlike you, I am in love and extremely polished with the worm. Indeed, I have been called "a master with the worm" by a friend of mine...hahaha!
One thing I have found is that when the fish are feeding, they will readily take on a worm as much as if not more than any other bait. I have caught more fish with a plastic worm of some kind than all other lures combined.
As much as I love it however, I do not think a worm would be my first choice pre spawn. From what I have read about prespawn fish, they are feeding tremendously; almost every day. They are just coming out of winter and they are just getting ready to start one of the most stressful times of their lives. They will not be eating for quite some time so they are gorging themselves in preparation.
So, at this time, they will probably hit just about anything you throw at their general direction, even if it means they have to move a ways to get it. Baits you might want to throw include fast moving "search baits" such as flukes, spinnerbaits, cranks, lipless cranks, etc.
Because you typically fish these baits faster, you will be covering a lot more water and hopefully putting the bait in front of more fish's general vicinity. You will get a lot of takes from these mad hungry fish. In a perfect world, you you will be putting a ton of fish in the boat and doing so very quickly.
If you were fishing a worm, you would get a lot of takes, but it would take you quite a while to find these fish. Once you found them though, you could probably put a hurting on them. I would just think it would take wayyy longer than fishing something fast.
During the prespawn you might want to save the worms and other plastics for post frontal conditions, or to pick up any stragglers in a fished area who were weary of fast moving baits and did not take them.
This is just what I would do in this situation
---Carlos