The soft bait glue works well in the sense that it glues plastic together really well, but my experience with it was that it was so viscous (liquidy) that it got on my fingers every time I tried to use it, and I kept gluing my hand to the lure.

If you're repairing tears in those baits you mentioned, super glue gel works well, and is easy to work with - but it's not good if you're repairing a spot where the hook enters the bait (it makes that spot crusty and causes it to tear more).

If you're repairing a spot where the hook enters the bait, you can try heating up some plastic in the microwave in a pyrex cup, and carefully pouring it over or in to the damaged area. Just make sure to wear an oven mitt and don't scorch the plastic.

Another option is to use PVC glue, the kind of glue used to attach PVC pipes. You can get it at the hardware store. My experience with this stuff was that it didn't bond super tight, and it got kind of wrinkly looking after a while, but it's not toooo bad.

One more method worth mentioning is to use a small pocket style blow torch to heat the plastic, then push the plastic back together. I've seen Rod Thigpin repair Stocker Trout this way and it works well. I've never tried it personally.