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You can disenchant the Souleater's Mace and enchant another weapon with the Soul Trap effect. I didn't see anything else like this on Nexus or even on Google when I looked, either for LE Enderal or SE, nor in the LE and SE Skyrim Nexus' sites. No scripts were changed. I only removed the "NoDisenchant" tag in EnderalSE Edit. I've tested it in-game, I've enchanted my favorite weapons with the Soul Trap enchantment and IT WORKS.
Human souls are still unable to be captured, and I'd have to change scripts and things to get that to work, which I'd rather not do. If you want that, Yero's Cave Full - new soul trap system (SE) has a soul gem to capture human souls. As for the harder to beat boss, you can always just turn on god mode if you don't like that part (unfortunately, there isn't a version that JUST adds the new soul gem and opens up the cave, I checked).
Should be compatible with everything, though you MAY have to load this under Yero's Cave. I don't use it, so I don't know.